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Test du Lenovo Yoga C740-15IML (i7-10510U, UHD 620, FHD) : bonne autonomie, écran moyen

Des performances en baisse. La puce graphique dédiée a disparu sans être remplacée, l’écran 4K UHD n’est plus disponible, et le port Thunderbolt 3 a également disparu : au premier abord, le Lenovo Yoga C740-15IML semble être une régression par rapport à son prédécesseur. Si cela est bien vrai pour certains aspects du convertible, d’autres domaines ont connu des améliorations. Malheureusement, notre modèle souffre d’une luminosité d’écran vraiment trop faible. Lisez notre test approfondi pour découvrir ce que Lenovo fait bien et ce qu’il fait mal.
Benjamin Herzig, 👁 Andreas Osthoff, Andrea Grüblinger (traduit par Prévots),
Lenovo Yoga C740-15IML
Processeur
Intel Core i7-10510U 4 x 1.8 - 4.8 GHz, Comet Lake-U
Carte graphique
Mémoire
16384 Mo 
, DDR4-2666, soudée
Écran
15.60 pouces 16:9, 1920 x 1080 pixel 141 PPP, 10 points, Prise en charge native d'une utilisation avec un stylet, B156HAN02.5, LED IPS, brillant: non, HDR
Carte mère
Intel Comet Lake-U PCH-LP Premium
Disque dur
Samsung SSD PM981 MZVLB512HAJQ, 512 Go 
, M.2 2280 PCIe NVMe, 435 Go libres
Carte son
Intel Comet Lake PCH-LP - cAVS
Connexions
4 USB 3.0 / 3.1 Gen1, 2 DisplayPort, Connectique audio: jack, 1 Lecteur d'empreintes digitales, Capteurs: accéléromètre
Réseau
Intel Wi-Fi 6 AX201 (a/b/g/h/n = Wi-Fi 4/ac = Wi-Fi 5/ax = Wi-Fi 6), Bluetooth 5.1
Taille
Hauteur x Largeur x Profondeur (en mm): 17.25 x 357.8 x 235.35
Batterie
60.3 Wh Lithium-Ion
Système d'exploitation
Microsoft Windows 10 Home 64 Bit
Appareil photo
Webcam: 720p avec cache
Fonctionnalités additionnelles
Haut-parleurs: stéréo 2 W, Clavier: chiclet 6 rangs avec pavé numérique, Rétroéclairage du clavier: oui, Lenovo Active Pen 2, hub Lenovo USB C 3-en-1, Lenovo Vantage, Lenovo Utility, configuration du stylet Lenovo, Microsoft Office (version d'essai), 24 Mois Garantie
Poids
1.862 kg, Alimentation: 355 g
Prix
1149 Euro
Note: The manufacturer may use components from different suppliers including display panels, drives or memory sticks with similar specifications.

 

Note
Date
Modèle
Poids
Épaisseur
Taille
Résolution
Best Price
85 %
01/20
Lenovo Yoga C740-15IML
i7-10510U, UHD Graphics 620
1.9 kg17.25 mm15.60"1920x1080
83 %
07/18
Lenovo Yoga 730-15IKB
i5-8550U, GeForce GTX 1050 Mobile
1.9 kg17.2 mm15.60"3840x2160
86 %
12/19
Lenovo Yoga C940-15IRH
i7-9750H, GeForce GTX 1650 Max-Q
2 kg19.7 mm15.60"1920x1080
81 %
06/18
Dell Inspiron 15 5579-9672
i5-8250U, UHD Graphics 620
2.1 kg20.2 mm15.60"1920x1080
82 %
04/18
Asus ZenBook Flip 15 UX561UD
i5-8550U, GeForce GTX 1050 Mobile
2.1 kg21 mm15.60"3840x2160
80 %
04/18
HP Envy x360 15-bq102ng
R5 2500U, Vega 8
2.1 kg19.6 mm15.60"1920x1080

Comparaison des tailles

381.9 mm 253.1 mm 20.2 mm 2.1 kg364 mm 246 mm 21 mm 2.1 kg359.7 mm 248.8 mm 19.6 mm 2.1 kg360 mm 249 mm 17.2 mm 1.9 kg357.8 mm 235.35 mm 17.25 mm 1.9 kg355.2 mm 238.4 mm 19.7 mm 2 kg
Côté droit : 2 USB A 3.0.
Côté droit : 2 USB A 3.0.
Côté gauche : 2 USB C 3.1 Gen 1, prise jack.
Côté gauche : 2 USB C 3.1 Gen 1, prise jack.
Networking
iperf3 Client (receive) TCP 1 m 4M x10
Lenovo Yoga C740-15IML
Intel Wi-Fi 6 AX201
1420 MBit/s ∼100%
HP Envy x360 15-bq102ng
Realtek RTL8822BE Wireless LAN 802.11ac PCIe Adapter
632 MBit/s ∼45% -55%
Lenovo Yoga 730-15IKB
Realtek RTL8822BE Wireless LAN 802.11ac PCIe Adapter
616 MBit/s ∼43% -57%
Dell Inspiron 15 5579-9672
Qualcomm Atheros QCA61x4
612 MBit/s ∼43% -57%
Average of class Convertible
  (28.7 - 1470, n=181)
566 MBit/s ∼40% -60%
Asus ZenBook Flip 15 UX561UD
Intel Dual Band Wireless-AC 8265
461 MBit/s ∼32% -68%
iperf3 Client (transmit) TCP 1 m 4M x10
Lenovo Yoga C740-15IML
Intel Wi-Fi 6 AX201
1380 MBit/s ∼100%
HP Envy x360 15-bq102ng
Realtek RTL8822BE Wireless LAN 802.11ac PCIe Adapter
676 MBit/s ∼49% -51%
Asus ZenBook Flip 15 UX561UD
Intel Dual Band Wireless-AC 8265
666 MBit/s ∼48% -52%
Dell Inspiron 15 5579-9672
Qualcomm Atheros QCA61x4
657 MBit/s ∼48% -52%
Lenovo Yoga 730-15IKB
Realtek RTL8822BE Wireless LAN 802.11ac PCIe Adapter
650 MBit/s ∼47% -53%
Average of class Convertible
  (36.4 - 1411, n=181)
561 MBit/s ∼41% -59%
283
cd/m²
280
cd/m²
278
cd/m²
267
cd/m²
286
cd/m²
251
cd/m²
258
cd/m²
276
cd/m²
237
cd/m²
Homogénéité de la luminosité
B156HAN02.5
X-Rite i1Pro 2
Maximum: 286 cd/m² Moyenne: 268.4 cd/m² Minimum: 2.8 cd/m²
Homogénéité de la luminosité: 83 %
Valeur mesurée au centre, sur batterie: 287 cd/m²
Contraste: 1430:1 (Valeurs des noirs: 0.2 cd/m²)
ΔE Color 7.3 | 0.6-29.43 Ø5.7, calibrated: 5.1
ΔE Greyscale 7 | 0.64-98 Ø5.9
57.5% sRGB (Argyll 3D) 36.9% AdobeRGB 1998 (Argyll 3D)
Gamma: 2.35
Lenovo Yoga C740-15IML
B156HAN02.5, IPS LED, 1920x1080, 15.60
Lenovo Yoga 730-15IKB
BOE HF NV156QUM-N51, IPS, 3840x2160, 15.60
Dell Inspiron 15 5579-9672
AUO, B156HW01, IPS, 1920x1080, 15.60
Asus ZenBook Flip 15 UX561UD
B156ZAN03.1, IPS, 3840x2160, 15.60
HP Envy x360 15-bq102ng
Chi Mei CM15E9, IPS, 1920x1080, 15.60
Response Times
28%
15%
4%
21%
Response Time Grey 50% / Grey 80% *
50.8 (24, 26.8)
34 (16, 18)
33%
41 (19, 22)
19%
52 (25, 27)
-2%
40 (22, 18)
21%
Response Time Black / White *
32.4 (17.6, 14.8)
25 (14, 11)
23%
29 (17, 12)
10%
29 (15, 14)
10%
26 (14, 12)
20%
PWM Frequency
961 (90)
25000 (30)
Screen
16%
9%
40%
24%
Brightness middle
286
309
8%
251
-12%
380
33%
221
-23%
Brightness
268
299
12%
240
-10%
371
38%
207
-23%
Brightness Distribution
83
84
1%
84
1%
87
5%
87
5%
Black Level *
0.2
0.29
-45%
0.2
-0%
0.28
-40%
0.15
25%
Contrast
1430
1066
-25%
1255
-12%
1357
-5%
1473
3%
Colorchecker DeltaE2000 *
7.3
3.9
47%
5.25
28%
4.38
40%
4.35
40%
Colorchecker DeltaE2000 max. *
21.7
7.5
65%
10.04
54%
7.59
65%
8.98
59%
Colorchecker DeltaE2000 calibrated *
5.1
Greyscale DeltaE2000 *
7
4.58
35%
3.28
53%
3.6
49%
3.09
56%
Gamma
2.35 94%
2.43 91%
2.15 102%
2.32 95%
2.23 99%
CCT
5847 111%
7344 89%
6502 100%
6860 95%
6068 107%
Color Space (Percent of AdobeRGB 1998)
36.9
39
6%
35
-5%
88
138%
56
52%
Color Space (Percent of sRGB)
57.5
90
57%
55
-4%
100
74%
86
50%
Moyenne finale (programmes/paramètres)
22% / 18%
12% / 10%
22% / 34%
23% / 24%

* ... Moindre est la valeur, meilleures sont les performances

Temps de réponse de l'écran

Le temps de réponse d'un écran mesure la rapidité à laquelle l'écran est capable de changer une couleur pour une autre. Un temps de réponse élevé se traduit par une image floutée pour les objets en mouvement. Les joueurs bénéficieront de faibles latences d'affichage en jeu.
       Temps de réponse noir à blanc
32.4 ms ... hausse ↗ et chute ↘ combinées↗ 17.6 ms hausse
↘ 14.8 ms chute
L'écran souffre de latences très élevées, à éviter pour le jeu.
En comparaison, tous les appareils testés affichent entre 0.8 (minimum) et 240 (maximum) ms. » 84 % des appareils testés affichent de meilleures performances.
Cela signifie que les latences relevées sont moins bonnes que la moyenne (24.3 ms) de tous les appareils testés.
       Temps de réponse gris 50% à gris 80%
50.8 ms ... hausse ↗ et chute ↘ combinées↗ 24 ms hausse
↘ 26.8 ms chute
L'écran souffre de latences très élevées, à éviter pour le jeu.
En comparaison, tous les appareils testés affichent entre 0.8 (minimum) et 636 (maximum) ms. » 84 % des appareils testés affichent de meilleures performances.
Cela signifie que les latences relevées sont moins bonnes que la moyenne (38.6 ms) de tous les appareils testés.

Scintillement / MLI (Modulation de largeur d'impulsion)

Afin d'abaisser la luminosité de l'écran, certains ordinateurs portables font varier très rapidement le rétroéclairage entre éteint et allumé. La fréquence à laquelle le rétroéclairage s'éteint et se rallume est normalement fixée à une valeur qui permet de rendre la variation indétectable à l'œil nu? Si la fréquence est trop basse, certaines personnes peuvent être sujettes à une fatigue oculaire, des maux de tête ou même percevoir les variations.
Scintillement / MLI (Modulation de largeur d'impulsion) non décelé

En comparaison, 51 % des appareils testés n'emploient pas MDI pour assombrir leur écran. Nous avons relevé une moyenne à 9596 (minimum : 5 - maximum : 142900) Hz dans le cas où une MDI était active.

Lenovo Yoga C740 - CPU-Z.
Lenovo Yoga C740 - CPU-Z.
Lenovo Yoga C740 - CPU-Z : caches.
Lenovo Yoga C740 - CPU-Z : caches.
Lenovo Yoga C740 - CPU-Z : carte-mère.
Lenovo Yoga C740 - CPU-Z : carte-mère.
Lenovo Yoga C740 - HWiNFO.
Lenovo Yoga C740 - HWiNFO.
Lenovo Yoga C740 - GPU-Z.
Lenovo Yoga C740 - GPU-Z.
Lenovo Yoga C740 - LatencyMon.
Lenovo Yoga C740 - LatencyMon.
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Lenovo Yoga C740-15IML Intel Core i7-10510U, Intel Core i7-10510U: Ø604 (560-752)
Lenovo Yoga 730-15IKB Intel Core i7-8550U, Intel Core i7-8550U: Ø672 (652.93-722.79)
Dell Inspiron 15 5579-9672 Intel Core i5-8250U, Intel Core i5-8250U: Ø503 (479.16-561.5)
Asus ZenBook Flip 15 UX561UD Intel Core i7-8550U, Intel Core i7-8550U: Ø581 (569.97-761.01)
HP Envy x360 15-bq102ng AMD Ryzen 5 2500U, AMD Ryzen 5 2500U: Ø561 (552.26-618.11)
Cinebench R15
CPU Single 64Bit
Lenovo Yoga C740-15IML
Intel Core i7-10510U
195 Points ∼100%
Lenovo Yoga C940-15IRH
Intel Core i7-9750H
184 Points ∼94% -6%
Average Intel Core i7-10510U
  (113 - 202, n=38)
178 Points ∼91% -9%
Asus ZenBook Flip 15 UX561UD
Intel Core i7-8550U
171 Points ∼88% -12%
Lenovo Yoga 730-15IKB
Intel Core i7-8550U
168 Points ∼86% -14%
HP Envy x360 15-bq102ng
AMD Ryzen 5 2500U
142 Points ∼73% -27%
Dell Inspiron 15 5579-9672
Intel Core i5-8250U
140 Points ∼72% -28%
Average of class Convertible
  (19 - 213, n=344)
112 Points ∼57% -43%
CPU Multi 64Bit
Lenovo Yoga C940-15IRH
Intel Core i7-9750H
1231 Points ∼100% +63%
Asus ZenBook Flip 15 UX561UD
Intel Core i7-8550U
761 Points ∼62% +1%
Lenovo Yoga C740-15IML
Intel Core i7-10510U
756 (560min - 756max) Points ∼61%
Lenovo Yoga 730-15IKB
Intel Core i7-8550U
723 Points ∼59% -4%
Average Intel Core i7-10510U
  (482 - 856, n=41)
664 Points ∼54% -12%
HP Envy x360 15-bq102ng
AMD Ryzen 5 2500U
618 Points ∼50% -18%
Dell Inspiron 15 5579-9672
Intel Core i5-8250U
562 Points ∼46% -26%
Average of class Convertible
  (33 - 1049, n=355)
345 Points ∼28% -54%
Cinebench R15 CPU Multi 64Bit
756 Points
Cinebench R15 OpenGL 64Bit
61 fps
Cinebench R15 Ref. Match 64Bit
98 %
Cinebench R15 CPU Single 64Bit
195 Points
Aide
PCMark 10
Digital Content Creation
Asus ZenBook Flip 15 UX561UD
GeForce GTX 1050 Mobile, i5-8550U, Micron 1100 MTFDDAV256TBN
4146 Points ∼100% +18%
Lenovo Yoga 730-15IKB
GeForce GTX 1050 Mobile, i5-8550U, SK Hynix PC401 512GB M.2 (HFS512GD9TNG)
4042 Points ∼97% +15%
Lenovo Yoga C740-15IML
UHD Graphics 620, i7-10510U, Samsung SSD PM981 MZVLB512HAJQ
3522 Points ∼85%
Average Intel Core i7-10510U, Intel UHD Graphics 620
  (2465 - 4741, n=16)
3239 Points ∼78% -8%
HP Envy x360 15-bq102ng
Vega 8, R5 2500U, Samsung PM961 MZVLW256HEHP
2848 Points ∼69% -19%
Average of class Convertible
  (605 - 5161, n=136)
2676 Points ∼65% -24%
Dell Inspiron 15 5579-9672
UHD Graphics 620, i5-8250U, SK hynix SC311 SATA
2656 Points ∼64% -25%
Productivity
Lenovo Yoga C740-15IML
UHD Graphics 620, i7-10510U, Samsung SSD PM981 MZVLB512HAJQ
7254 Points ∼100%
Average Intel Core i7-10510U, Intel UHD Graphics 620
  (6554 - 8036, n=16)
7243 Points ∼100% 0%
Lenovo Yoga 730-15IKB
GeForce GTX 1050 Mobile, i5-8550U, SK Hynix PC401 512GB M.2 (HFS512GD9TNG)
6678 Points ∼92% -8%
Asus ZenBook Flip 15 UX561UD
GeForce GTX 1050 Mobile, i5-8550U, Micron 1100 MTFDDAV256TBN
6024 Points ∼83% -17%
Average of class Convertible
  (1121 - 7945, n=138)
5514 Points ∼76% -24%
Dell Inspiron 15 5579-9672
UHD Graphics 620, i5-8250U, SK hynix SC311 SATA
4811 Points ∼66% -34%
HP Envy x360 15-bq102ng
Vega 8, R5 2500U, Samsung PM961 MZVLW256HEHP
3901 Points ∼54% -46%
Essentials
Lenovo Yoga C740-15IML
UHD Graphics 620, i7-10510U, Samsung SSD PM981 MZVLB512HAJQ
10546 Points ∼100%
Average Intel Core i7-10510U, Intel UHD Graphics 620
  (8020 - 10546, n=16)
9266 Points ∼88% -12%
Asus ZenBook Flip 15 UX561UD
GeForce GTX 1050 Mobile, i5-8550U, Micron 1100 MTFDDAV256TBN
8388 Points ∼80% -20%
Lenovo Yoga 730-15IKB
GeForce GTX 1050 Mobile, i5-8550U, SK Hynix PC401 512GB M.2 (HFS512GD9TNG)
8258 Points ∼78% -22%
Average of class Convertible
  (2489 - 10546, n=138)
7324 Points ∼69% -31%
Dell Inspiron 15 5579-9672
UHD Graphics 620, i5-8250U, SK hynix SC311 SATA
6349 Points ∼60% -40%
HP Envy x360 15-bq102ng
Vega 8, R5 2500U, Samsung PM961 MZVLW256HEHP
6236 Points ∼59% -41%
Score
Lenovo Yoga C740-15IML
UHD Graphics 620, i7-10510U, Samsung SSD PM981 MZVLB512HAJQ
4630 Points ∼100%
Lenovo Yoga 730-15IKB
GeForce GTX 1050 Mobile, i5-8550U, SK Hynix PC401 512GB M.2 (HFS512GD9TNG)
4347 Points ∼94% -6%
Average Intel Core i7-10510U, Intel UHD Graphics 620
  (3783 - 4688, n=16)
4299 Points ∼93% -7%
Asus ZenBook Flip 15 UX561UD
GeForce GTX 1050 Mobile, i5-8550U, Micron 1100 MTFDDAV256TBN
4249 Points ∼92% -8%
Average of class Convertible
  (872 - 5214, n=139)
3370 Points ∼73% -27%
HP Envy x360 15-bq102ng
Vega 8, R5 2500U, Samsung PM961 MZVLW256HEHP
2944 Points ∼64% -36%
Dell Inspiron 15 5579-9672
UHD Graphics 620, i5-8250U, SK hynix SC311 SATA
2208 Points ∼48% -52%
PCMark 8
Work Score Accelerated v2
Lenovo Yoga C740-15IML
UHD Graphics 620, i7-10510U, Samsung SSD PM981 MZVLB512HAJQ
5366 Points ∼100%
Average Intel Core i7-10510U, Intel UHD Graphics 620
  (3734 - 5366, n=13)
4987 Points ∼93% -7%
Dell Inspiron 15 5579-9672
UHD Graphics 620, i5-8250U, SK hynix SC311 SATA
4556 Points ∼85% -15%
Asus ZenBook Flip 15 UX561UD
GeForce GTX 1050 Mobile, i5-8550U, Micron 1100 MTFDDAV256TBN
4401 Points ∼82% -18%
Lenovo Yoga 730-15IKB
GeForce GTX 1050 Mobile, i5-8550U, SK Hynix PC401 512GB M.2 (HFS512GD9TNG)
4382 Points ∼82% -18%
Average of class Convertible
  (1007 - 5366, n=260)
3828 Points ∼71% -29%
HP Envy x360 15-bq102ng
Vega 8, R5 2500U, Samsung PM961 MZVLW256HEHP
3800 Points ∼71% -29%
Home Score Accelerated v2
Lenovo Yoga C740-15IML
UHD Graphics 620, i7-10510U, Samsung SSD PM981 MZVLB512HAJQ
3935 Points ∼100%
Average Intel Core i7-10510U, Intel UHD Graphics 620
  (3157 - 4251, n=13)
3635 Points ∼92% -8%
Asus ZenBook Flip 15 UX561UD
GeForce GTX 1050 Mobile, i5-8550U, Micron 1100 MTFDDAV256TBN
3614 Points ∼92% -8%
Lenovo Yoga 730-15IKB
GeForce GTX 1050 Mobile, i5-8550U, SK Hynix PC401 512GB M.2 (HFS512GD9TNG)
3505 Points ∼89% -11%
HP Envy x360 15-bq102ng
Vega 8, R5 2500U, Samsung PM961 MZVLW256HEHP
3462 Points ∼88% -12%
Dell Inspiron 15 5579-9672
UHD Graphics 620, i5-8250U, SK hynix SC311 SATA
3370 Points ∼86% -14%
Average of class Convertible
  (741 - 4741, n=310)
2874 Points ∼73% -27%
PCMark 8 Home Score Accelerated v2
3935 points
PCMark 8 Work Score Accelerated v2
5366 points
PCMark 10 Score
4630 points
Aide
Lenovo Yoga C740-15IML
Samsung SSD PM981 MZVLB512HAJQ
Lenovo Yoga 730-15IKB
SK Hynix PC401 512GB M.2 (HFS512GD9TNG)
Dell Inspiron 15 5579-9672
SK hynix SC311 SATA
Asus ZenBook Flip 15 UX561UD
Micron 1100 MTFDDAV256TBN
HP Envy x360 15-bq102ng
Samsung PM961 MZVLW256HEHP
Average Samsung SSD PM981 MZVLB512HAJQ
 
CrystalDiskMark 5.2 / 6
-10%
-70%
-61%
-29%
-16%
Write 4K
142.3
164.9
16%
48.25
-66%
112.6
-21%
116
-18%
127 (90.4 - 176, n=64)
-11%
Read 4K
47.56
50.49
6%
23.77
-50%
29.67
-38%
42.73
-10%
44 (28 - 61.3, n=63)
-7%
Write Seq
2185
1262
-42%
444.9
-80%
432.1
-80%
1222
-44%
1617 (112 - 2730, n=62)
-26%
Read Seq
2235
2054
-8%
497.5
-78%
479.9
-79%
1608
-28%
1716 (501 - 2665, n=62)
-23%
Write 4K Q32T1
515.4
477.6
-7%
223.5
-57%
191
-63%
280.1
-46%
413 (198 - 1707, n=64)
-20%
Read 4K Q32T1
413.4
549.7
33%
171.8
-58%
246.5
-40%
333.6
-19%
420 (230 - 1015, n=64)
2%
Write Seq Q32T1
2981
1400
-53%
510.9
-83%
450.3
-85%
1291
-57%
2076 (1714 - 2994, n=64)
-30%
Read Seq Q32T1
3565
2672
-25%
552.8
-84%
522.4
-85%
3183
-11%
3130 (1772 - 3565, n=64)
-12%
Samsung SSD PM981 MZVLB512HAJQ
Sequential Read: 2499 MB/s
Sequential Write: 2196 MB/s
512K Read: 1779 MB/s
512K Write: 1735 MB/s
4K Read: 65.23 MB/s
4K Write: 143.7 MB/s
4K QD32 Read: 401.1 MB/s
4K QD32 Write: 471.4 MB/s
3DMark 11 - 1280x720 Performance GPU
Asus ZenBook Flip 15 UX561UD
NVIDIA GeForce GTX 1050 Mobile, Intel Core i7-8550U
7339 Points ∼100% +267%
Lenovo Yoga 730-15IKB
NVIDIA GeForce GTX 1050 Mobile, Intel Core i7-8550U
6935 Points ∼94% +247%
HP Envy x360 15-bq102ng
AMD Radeon RX Vega 8 (Ryzen 2000/3000), AMD Ryzen 5 2500U
3549 Points ∼48% +78%
Lenovo Yoga C740-15IML
Intel UHD Graphics 620, Intel Core i7-10510U
1999 Points ∼27%
Average Intel UHD Graphics 620
  (1235 - 2006, n=231)
1744 Points ∼24% -13%
Dell Inspiron 15 5579-9672
Intel UHD Graphics 620, Intel Core i5-8250U
1529 Points ∼21% -24%
Average of class Convertible
  (173 - 17421, n=368)
1524 Points ∼21% -24%
3DMark
2560x1440 Time Spy Graphics
Lenovo Yoga 730-15IKB
NVIDIA GeForce GTX 1050 Mobile, Intel Core i7-8550U
1416 Points ∼100% +227%
HP Envy x360 15-bq102ng
AMD Radeon RX Vega 8 (Ryzen 2000/3000), AMD Ryzen 5 2500U
649 Points ∼46% +50%
Average of class Convertible
  (85 - 5126, n=64)
642 Points ∼45% +48%
Lenovo Yoga C740-15IML
Intel UHD Graphics 620, Intel Core i7-10510U
433 Points ∼31%
Average Intel UHD Graphics 620
  (299 - 443, n=77)
378 Points ∼27% -13%
Dell Inspiron 15 5579-9672
Intel UHD Graphics 620, Intel Core i5-8250U
317 Points ∼22% -27%
1920x1080 Fire Strike Graphics
Lenovo Yoga 730-15IKB
NVIDIA GeForce GTX 1050 Mobile, Intel Core i7-8550U
5965 Points ∼100% +336%
Asus ZenBook Flip 15 UX561UD
NVIDIA GeForce GTX 1050 Mobile, Intel Core i7-8550U
5329 Points ∼89% +289%
HP Envy x360 15-bq102ng
AMD Radeon RX Vega 8 (Ryzen 2000/3000), AMD Ryzen 5 2500U
2310 Points ∼39% +69%
Lenovo Yoga C740-15IML
Intel UHD Graphics 620, Intel Core i7-10510U
1369 Points ∼23%
Average of class Convertible
  (132 - 13158, n=274)
1219 Points ∼20% -11%
Average Intel UHD Graphics 620
  (557 - 1420, n=199)
1152 Points ∼19% -16%
Dell Inspiron 15 5579-9672
Intel UHD Graphics 620, Intel Core i5-8250U
997 Points ∼17% -27%
1280x720 Cloud Gate Standard Graphics
Lenovo Yoga 730-15IKB
NVIDIA GeForce GTX 1050 Mobile, Intel Core i7-8550U
26144 Points ∼100% +139%
Asus ZenBook Flip 15 UX561UD
NVIDIA GeForce GTX 1050 Mobile, Intel Core i7-8550U
16381 Points ∼63% +50%
HP Envy x360 15-bq102ng
AMD Radeon RX Vega 8 (Ryzen 2000/3000), AMD Ryzen 5 2500U
15186 Points ∼58% +39%
Lenovo Yoga C740-15IML
Intel UHD Graphics 620, Intel Core i7-10510U
10927 Points ∼42%
Average Intel UHD Graphics 620
  (6910 - 11436, n=212)
9229 Points ∼35% -16%
Dell Inspiron 15 5579-9672
Intel UHD Graphics 620, Intel Core i5-8250U
8112 Points ∼31% -26%
Average of class Convertible
  (1023 - 38419, n=320)
7549 Points ∼29% -31%
3DMark 11 Performance
2275 points
3DMark Cloud Gate Standard Score
9909 points
3DMark Fire Strike Score
1249 points
3DMark Time Spy Score
497 points
Aide
Bas Moyen Élevé Ultra
BioShock Infinite (2013) 84.9 42.5 35.2 11.4 fps
Dota 2 Reborn (2015) 90 56.5 23.2 20.5 fps
Rise of the Tomb Raider (2016) 24.6 14.8 fps
X-Plane 11.11 (2018) 27.7 17.8 15.7 fps
Total War: Three Kingdoms (2019) 30.5 7.9 fps

Degré de la nuisance sonore

Au repos
29.3 / 29.3 / 29.6 dB(A)
Fortement sollicité
32.4 / 33.3 dB(A)
  red to green bar
 
 
30 dB
silencieux
40 dB(A)
audible
50 dB(A)
bruyant
 
min: dark, med: mid, max: light   Audix TM1, Arta (à 15 cm de distance)   environment noise: 29.3 dB(A)
dB(A) 0102030405060708090Deep BassMiddle BassHigh BassLower RangeMidsHigher MidsLower HighsMid HighsUpper HighsSuper Highs2032.833.832.3312531.627.727.92931323030.128.54029.329.229.929.25026.926.827.126.96325.423.225.826.98024.923.82424.810026.22524.52512523.62424.423.816023.924.824.22520023.323.823.523.525023.623.323.423.631523.121.922.222.240022.321.820.121.450022.922.720.122.163022.12219.121.38002121.118.419.9100021.621.81820.1125022.622.217.620.7160023.222.516.921200022.32216.719.4250021.821.215.619.1315021.220.815.418.7400020.42015.217.9500019.519.215.217.7630019.518.615.316.4800017.31715.415.91000015.915.815.315.41250015.115.315.115.11600014.914.814.814.8SPL33.33329.331.5N1.91.81.21.6median 22.1median 21.8median 17.6median 20.1Delta1.91.73.72.234.234.533.732.234.234.23434.132.934.234.433.232.832.634.432.432.331.232.432.429.429.130.129.129.428.528.128.428.128.527.427.325.727.227.425.426.325.926.325.425.525.725.725.225.524.624.925.123.224.623.724.324.423.523.722.524.324.221.622.523.125.425.521.823.121.624.625.820.221.621.125.124.619.421.119.824.324.21919.819.824.724.718.319.820.929.129.217.820.919.326.426.917.719.319.426.727.317.419.419.525.826.217.519.519.826.526.917.719.818.128.92817.818.118.221.621.91818.218.521.321.518.218.518.519.619.718.418.518.719.319.318.718.719.119.219.118.919.119.219.219.319.119.219.519.619.619.519.531.637.537.530.531.61.52.52.51.31.5median 19.8median 24.7median 24.7median 18.9median 19.81.82.42.21.81.8hearing rangehide median Fan NoiseLenovo Yoga C740-15IMLLenovo Yoga 730-15IKB
 38.2 °C40.1 °C39.3 °C 
 35 °C33.4 °C27.4 °C 
 25.3 °C25.4 °C24.6 °C 
Maximum: 40.1 °C
Moyenne: 32.1 °C
38 °C42.3 °C40.1 °C
27.2 °C34.6 °C34.1 °C
25.4 °C27.6 °C27.6 °C
Maximum: 42.3 °C
Moyenne: 33 °C
Alimentation (valeur maximale)  36 °C | Température ambiante de la pièce 20.1 °C | Voltcraft IR-900
(±) The average temperature for the upper side under maximal load is 32.1 °C / 90 F, compared to the average of 30.3 °C / 87 F for the devices in the class Convertible.
(±) The maximum temperature on the upper side is 40.1 °C / 104 F, compared to the average of 35.3 °C / 96 F, ranging from 21.8 to 55.7 °C for the class Convertible.
(±) The bottom heats up to a maximum of 42.3 °C / 108 F, compared to the average of 36.5 °C / 98 F
(+) In idle usage, the average temperature for the upper side is 22.2 °C / 72 F, compared to the device average of 30.3 °C / 87 F.
(+) The palmrests and touchpad are cooler than skin temperature with a maximum of 25.4 °C / 77.7 F and are therefore cool to the touch.
(+) The average temperature of the palmrest area of similar devices was 28.8 °C / 83.8 F (+3.4 °C / 6.1 F).
dB(A) 0102030405060708090Deep BassMiddle BassHigh BassLower RangeMidsHigher MidsLower HighsMid HighsUpper HighsSuper Highs2032.330.52527.928.83130.127.14029.928.95027.123.86325.825.7802428.510024.532.512524.438.916024.24620023.549.925023.450.931522.253.940020.158.850020.161.563019.165.480018.46710001864.4125017.664160016.962.6200016.760.5250015.655.8315015.457.2400015.261.9500015.255.3630015.352.3800015.455.81000015.351.81250015.146.91600014.838.8SPL29.373.3N1.231.6median 17.6median 55.8Delta3.77.234.132.234.133.732.933.732.232.632.230.132.430.130.729.130.728.728.128.727.527.227.530.326.330.341.625.241.650.923.250.952.323.552.352.421.652.461.421.861.468.520.268.565.219.465.266196671.918.371.970.317.870.36717.76769.817.469.873.317.573.365.617.765.663.817.863.859.41859.459.618.259.660.318.460.36518.76565.318.965.363.519.163.566.819.566.879.730.579.743.21.343.2median 65median 18.9median 655.81.85.8hearing rangehide median Pink NoiseLenovo Yoga C740-15IMLLenovo Yoga 730-15IKB
Frequency diagram (checkboxes can be checked and unchecked to compare devices)
Lenovo Yoga C740-15IML audio analysis

(±) | speaker loudness is average but good (73.3 dB)
Bass 100 - 315 Hz
(±) | reduced bass - on average 10.4% lower than median
(±) | linearity of bass is average (11.1% delta to prev. frequency)
Mids 400 - 2000 Hz
(±) | higher mids - on average 7.2% higher than median
(+) | mids are linear (6.4% delta to prev. frequency)
Highs 2 - 16 kHz
(+) | balanced highs - only 2.2% away from median
(±) | linearity of highs is average (10.5% delta to prev. frequency)
Overall 100 - 16.000 Hz
(±) | linearity of overall sound is average (18.4% difference to median)
Compared to same class
» 33% of all tested devices in this class were better, 8% similar, 59% worse
» The best had a delta of 10%, average was 22%, worst was 53%
Compared to all devices tested
» 33% of all tested devices were better, 7% similar, 60% worse
» The best had a delta of 3%, average was 21%, worst was 65%

Lenovo Yoga 730-15IKB audio analysis

(±) | speaker loudness is average but good (73.34 dB)
Bass 100 - 315 Hz
(-) | nearly no bass - on average 16.9% lower than median
(±) | linearity of bass is average (12.2% delta to prev. frequency)
Mids 400 - 2000 Hz
(+) | balanced mids - only 4% away from median
(±) | linearity of mids is average (7.7% delta to prev. frequency)
Highs 2 - 16 kHz
(+) | balanced highs - only 2.6% away from median
(+) | highs are linear (6.1% delta to prev. frequency)
Overall 100 - 16.000 Hz
(+) | overall sound is linear (14.5% difference to median)
Compared to same class
» 10% of all tested devices in this class were better, 4% similar, 86% worse
» The best had a delta of 10%, average was 22%, worst was 53%
Compared to all devices tested
» 13% of all tested devices were better, 4% similar, 83% worse
» The best had a delta of 3%, average was 21%, worst was 65%

Consommation énergétique
Éteint/en veilledarklight 0.4 / 0.68 Watts
Au reposdarkmidlight 2.97 / 7.2 / 9.9 Watts
Fortement sollicité midlight 40.8 / 64.7 Watts
 color bar
Légende: min: dark, med: mid, max: light        Metrahit Energy
Lenovo Yoga C740-15IML
i7-10510U, UHD Graphics 620, Samsung SSD PM981 MZVLB512HAJQ, IPS LED, 1920x1080, 15.60
Lenovo Yoga 730-15IKB
i5-8550U, GeForce GTX 1050 Mobile, SK Hynix PC401 512GB M.2 (HFS512GD9TNG), IPS, 3840x2160, 15.60
Lenovo Yoga C940-15IRH
i7-9750H, GeForce GTX 1650 Max-Q, Intel Optane Memory H10 with Solid State Storage 32GB + 512GB HBRPEKNX0202A(L/H), IPS, 1920x1080, 15.60
Dell Inspiron 15 5579-9672
i5-8250U, UHD Graphics 620, SK hynix SC311 SATA, IPS, 1920x1080, 15.60
Asus ZenBook Flip 15 UX561UD
i5-8550U, GeForce GTX 1050 Mobile, Micron 1100 MTFDDAV256TBN, IPS, 3840x2160, 15.60
HP Envy x360 15-bq102ng
R5 2500U, Vega 8, Samsung PM961 MZVLW256HEHP, IPS, 1920x1080, 15.60
Average Intel UHD Graphics 620
 
Average of class Convertible
 
Power Consumption
-33%
-99%
12%
-76%
-5%
6%
5%
Idle Minimum *
2.97
4.8
-62%
5.2
-75%
3.9
-31%
5.4
-82%
4.8
-62%
3.79 (1 - 12.4, n=244)
-28%
4.56 (1 - 23, n=418)
-54%
Idle Average *
7.2
10.1
-40%
10.7
-49%
6.6
8%
10.8
-50%
7
3%
6.95 (2.8 - 15.7, n=246)
3%
7.7 (1.3 - 32.3, n=418)
-7%
Idle Maximum *
9.9
10.7
-8%
24.3
-145%
9.3
6%
13.9
-40%
9.5
4%
8.71 (3.8 - 16.6, n=244)
12%
9.23 (1.8 - 61, n=418)
7%
Load Average *
40.8
44
-8%
84.4
-107%
30.2
26%
94
-130%
40.8
-0%
35.1 (8.1 - 51.6, n=244)
14%
27.4 (1.4 - 94, n=416)
33%
Load Maximum *
64.7
94.7
-46%
142.8
-121%
33.2
49%
116.6
-80%
44.3
32%
47.3 (22 - 96.3, n=246)
27%
33.6 (6.8 - 118, n=417)
48%
Witcher 3 ultra *
83.9

* ... Moindre est la valeur, meilleures sont les performances

Autonomie
NBC WiFi Websurfing Battery Test 1.3 (Edge)
10h 22min
NBC WiFi Websurfing Battery Test 1.3 max Brightness (Edge)
8h 15min
En lecture de Big Buck Bunny encodé en H.264 1080p
11h 55min
Fortement sollicité (luminosité au maximum)
2h 00min
Lenovo Yoga C740-15IML
i7-10510U, UHD Graphics 620, 60.3 Wh
Lenovo Yoga 730-15IKB
i5-8550U, GeForce GTX 1050 Mobile, 51.5 Wh
Lenovo Yoga C940-15IRH
i7-9750H, GeForce GTX 1650 Max-Q, 69 Wh
Dell Inspiron 15 5579-9672
i5-8250U, UHD Graphics 620, 42 Wh
Asus ZenBook Flip 15 UX561UD
i5-8550U, GeForce GTX 1050 Mobile, 52 Wh
HP Envy x360 15-bq102ng
R5 2500U, Vega 8, 55.8 Wh
Average of class Convertible
 
Autonomie de la batterie
-51%
-29%
-27%
-48%
-32%
-13%
Reader / Idle
697
1092
671
558
805 (117 - 2892, n=309)
H.264
715
324
-55%
401
-44%
261
-63%
464 (206 - 1070, n=128)
-35%
WiFi v1.3
622
370
-41%
583
-6%
435
-30%
311
-50%
426
-32%
470 (153 - 1141, n=293)
-24%
Load
120
50
-58%
59
-51%
110
-8%
84
-30%
145 (49 - 677, n=310)
21%

Points positifs

+ solidité et qualité du châssis
+ présence d'un stylet
+ nuisances sonores et chauffe
+ haut-parleurs
+ autonomie

Points négatifs

- performances en baisse face au prédécesseur
- absence de Thunderbolt 3
- version 4K UHD absente
- luminosité et couleurs de l'écran LCD Full HD
En test : le Lenovo Yoga C740-15IML. Modèle de test aimablement fourni par
En test : le Lenovo Yoga C740-15IML. Modèle de test aimablement fourni par

Le passage du Yoga 720-15IKB au Yoga 730-15IKB, et finalement au dernier Yoga C740-15IML est marquant : nous sommes passés d’un convertible ultra performant avec une carte graphique Nvidia GeForce GTX (et un processeur de 45 W), à un convertible ultraportable avec un processeur ULV et sans GPU dédié. Notons cependant que le rôle initial de la série reste tenu par le nouveau et plus coûteux Lenovo Yoga C940-15IRH.

Ce que nous retrouvons ici est un bon convertible avec un châssis premium en aluminium, un stylet, un niveau sonore et une chauffe bien maîtrisés, ainsi qu’une bonne autonomie. Cependant le Yoga C740-15IML est moins puissant que son prédécesseur, à cause de l’absence de carte graphique dédiée et d’un refroidissement moins efficace. La perte du port Thunderbolt 3 est décevante, et il n’y a plus de version 4K UHD.

Des performances en baisse : le Yoga C740-15IML est un convertible qui tranche avec ses deux prédécesseurs. S’il n’est pas tout mauvais, il faudra écarter notre configuration avec l’écran FHD trop sombre. Heureusement, il y a une version avec un LCD plus lumineux.

Nous pouvons tout à fait recommander le Lenovo Yoga C740-15IML à ceux qui recherchent un convertible de 15,6 pouces faible consommation – si ce n’était la luminosité de l’écran trop faible. À cause de ce dernier point, nous recommandons aux utilisateurs de choisir la version FHD avec l’écran de 500 cd/m2. Si nous n’avons pas encore pu vérifier les qualités de cet écran, il peut difficilement faire pire que celui de notre machine…

L’intégralité de cette critique est disponible en anglais en suivant ce lien.

Lenovo Yoga C740-15IML - 01/04/2020 v7
Benjamin Herzig

Châssis
87 / 98 → 89%
Clavier
79%
Dispositif de pointage
85%
Connectivité
62 / 75 → 83%
Poids
65 / 20-75 → 81%
Autonomie
88%
Écran
77%
Performances en jeu
52 / 78 → 67%
Performances dans les applications
83 / 85 → 98%
Chauffe
93%
Nuisance sonore
97%
Audio
65 / 91 → 72%
Appareil photo
34 / 85 → 40%
Moyenne
75%
85%
Convertible - Moyenne compensée

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> Revues et rapports de ordinateurs portatifs et smartphones, ordiphones > Critiques > Test du Lenovo Yoga C740-15IML (i7-10510U, UHD 620, FHD) : bonne autonomie, écran moyen
Benjamin Herzig, 2020-01-18 (Update: 2020-01-18)