Lenovo IdeaPad C340-15IWL laptop review: Lenovo's convertible pleases with long battery life

Versatile. With the IdeaPad C340-15IWL, Lenovo delivers a well-equipped 15.6-inch convertible, which also offers very good battery life. The IPS touchscreen display can be operated with your fingers as well as with the Lenovo Active Pen 2, which can be purchased separately.

Sascha Mölck, 👁 Sebastian Jentsch (translated by Stephanie Chamberlain), Published 10/24/2019 🇩🇪 🇫🇷 ...

With the IdeaPad C340-15IWL, Lenovo has a 15.6-inch convertible in its range that is powered by a Core i5-8265U processor and a GeForce MX230 graphics core. The 360-degree foldable screen allows for various usage modes. Devices such as the HP Envy x360 15 and the Dell Inspiron 15 5579 are among the competitors.

Test device courtesy of notebooksbilliger.de

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Lenovo Ideapad C340-15IWL-81N5004QGE (Ideapad C340 Series)

Processor

Intel Core i5-8265U 4 x 1.6 - 3.9 GHz, Whiskey Lake-U

Graphics adapter

NVIDIA GeForce MX230 - 2048 MB VRAM, Core: 1531 MHz, Memory: 1752 MHz, GDDR5, 64-bit interface, Nvidia 346.48, Optimus

Memory

8 GB

, DDR4 2666, dual-channel mode, one slot (occupied), 4 GB soldered

Display

15.60 inch 16:9, 1920 x 1080 pixel 141 PPI, capacitive, 10 touch points, native pen support, BOE CQ NV156FHM-N48, IPS, glossy: yes

Mainboard

Intel Cannon Lake-U PCH-LP Premium

Storage

SK hynix BC501 HFM128GDJTNG-831, 128 GB

, Seagate ST1000LM035 (5400 rpm, 1 TB), 1027 GB free

Connections

3 USB 3.0 / 3.1 Gen1, 1 HDMI, Audio Connections: combo audio, Card Reader: SD, SDHC, SDXC, MMC, 1 Fingerprint Reader, Sensors: motion sensor, TPM 2.0

Networking

Intel Wireless-AC 9560 (a/b/g/n = Wi-Fi 4/ac = Wi-Fi 5/), Bluetooth 5

Size

height x width x depth (in mm): 20.5 x 364 x 250 ( = 0.81 x 14.33 x 9.84 in)

Battery

52.5 Wh, 4610 mAh Lithium-Ion, 11.4 V

Charging

fast charging / Quickcharge

Operating System

Microsoft Windows 10 Home 64 Bit

Camera

Webcam: HD
Primary Camera: 0.9 MPix

Additional features

Speakers: stereo, Keyboard: chiclet, Keyboard Light: yes, McAfee LiveSafe (trial version), 24 Months Warranty

Weight

2 kg ( = 70.55 oz / 4.41 pounds), Power Supply: 356 g ( = 12.56 oz / 0.78 pounds)

Price

799 Euro

Links

Lenovo homepage
Lenovo notebook section

Note: The manufacturer may use components from different suppliers including display panels, drives or memory sticks with similar specifications.

see all specifications

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» Compare devices

Rating	Date	Model	Weight	Height	Size	Resolution
82.6 %	10/2019	Lenovo Ideapad C340-15IWL-81N5004QGE i5-8265U, GeForce MX230	2 kg	20.5 mm	15.60"	1920x1080
80.1 %	03/2018	HP Envy x360 15-bq102ng R5 2500U, Vega 8	2.1 kg	19.6 mm	15.60"	1920x1080
81.2 %	06/2018	Dell Inspiron 15 5579-9672 i5-8250U, UHD Graphics 620	2.1 kg	20.2 mm	15.60"	1920x1080

Case and connectivity - Lenovo C340 with USB Type-C

The top of the base unit is made of metal; the remaining components are made of plastic. Most of the case has a silver-gray tone (platinum). Only the display frame is black. The convertible is well built and doesn't reveal any serious stability flaws. However, the base unit should be a bit more rigid for our taste. In order to get to the innards, the bottom cover needs to be removed.

The three USB ports (2x Type-A, 1x Type-C) operate according to the USB 3.2 Gen 1 standard. The Type-C USB port doesn't support the functions for Power Delivery 3.0 or DisplayPort over USB Type-C. In addition, there's an HDMI port.

The built-in SD memory card reader doesn't fully accommodate SD cards; they stick out a good 16 mm (~0.63 in). Moreover, it is one of the faster representatives of its kind. Copying large blocks of data achieves a maximum transfer rate of 83 MB/s. The transfer of 250 JPG image files (each of around 5 MB) is completed at a speed of 70.6 MB/s. We test memory card readers using a reference card (Toshiba Exceria Pro SDXC 64 GB UHS-II).

The Wi-Fi module supports the fast ac standard. The transfer speeds measured under optimal conditions (no other Wi-Fi devices close by, short distance between laptop and server PC) are mediocre.

Size comparison

Dell Inspiron 15 5579-9672 Lenovo Ideapad C340-15IWL-81N5004QGE HP Envy x360 15-bq102ng DIN A4 ❌

Port configuration

Right side: power button, memory card reader (SD), 2x USB 3.2 Gen 1 (Type-A)

Left side: power supply, HDMI, USB 3.2 Gen 1 (Type-C), combo audio

SD Card Reader
average JPG Copy Test (av. of 3 runs)
Lenovo Ideapad C340-15IWL-81N5004QGE (Toshiba Exceria Pro SDXC 64 GB UHS-II)	70.6 MB/s ∼100%
HP Envy x360 15-bq102ng (Toshiba Exceria Pro SDXC 64 GB UHS-II)	69.4 MB/s ∼98% -2%
Average of class Convertible (17.7 - 177.7, n=50, last 2 years)	67.8 MB/s ∼96% -4%
Dell Inspiron 15 5579-9672 (Toshiba Exceria Pro SDXC 64 GB UHS-II)	26.3 MB/s ∼37% -63%
maximum AS SSD Seq Read Test (1GB)
Average of class Convertible (22.6 - 257, n=45, last 2 years)	87.5 MB/s ∼100% +5%
Lenovo Ideapad C340-15IWL-81N5004QGE (Toshiba Exceria Pro SDXC 64 GB UHS-II)	83 MB/s ∼95%
HP Envy x360 15-bq102ng (Toshiba Exceria Pro SDXC 64 GB UHS-II)	82 MB/s ∼94% -1%
Dell Inspiron 15 5579-9672 (Toshiba Exceria Pro SDXC 64 GB UHS-II)	29.7 MB/s ∼34% -64%

Networking
iperf3 transmit AX12
HP Envy x360 15-bq102ng Realtek RTL8822BE Wireless LAN 802.11ac PCIe Adapter	676 MBit/s ∼100% +119%
Dell Inspiron 15 5579-9672 Qualcomm Atheros QCA61x4	657 MBit/s ∼97% +113%
Lenovo Ideapad C340-15IWL-81N5004QGE Intel Wireless-AC 9560	309 (262^min - 329^max) MBit/s ∼46%
iperf3 receive AX12
HP Envy x360 15-bq102ng Realtek RTL8822BE Wireless LAN 802.11ac PCIe Adapter	632 MBit/s ∼100% +103%
Dell Inspiron 15 5579-9672 Qualcomm Atheros QCA61x4	612 MBit/s ∼97% +96%
Lenovo Ideapad C340-15IWL-81N5004QGE Intel Wireless-AC 9560	312 (271^min - 329^max) MBit/s ∼49%

Lenovo Ideapad C340-15IWL-81N5004QGE Intel Core i5-8265U, NVIDIA GeForce MX230; iperf3 receive AX12; iperf 3.1.3: Ø311 (271-329)

Lenovo Ideapad C340-15IWL-81N5004QGE Intel Core i5-8265U, NVIDIA GeForce MX230; iperf3 transmit AX12; iperf 3.1.3: Ø309 (262-329)

Input devices - The IdeaPad features keyboard backlighting

Lenovo has equipped the C340-15IWL with a backlit chiclet keyboard (two brightness levels). The flat, smooth keys provide a short travel and a clear pressure point. The resistance provided by the keys is pleasing. While typing, the keyboard gives in a little, but this didn't prove to be bothersome. All in all, Lenovo delivers a successful keyboard here that has proven its suitability for everyday use.

The multitouch-capable ClickPad takes up an area of about 10.5 x 7 cm (~4.13 x 2.76 in). The smooth pad surface makes gliding easy for the fingers. It has a short travel and a clear pressure point.

The touchscreen supports 10 touch points and responds quickly to inputs. It can be operated with both the fingers and the Lenovo Active Pen 2, which can be purchased separately.

Display - Lenovo convertible with an IPS panel

The IdeaPad's 15.6-inch touchscreen display works at a native resolution of 1920x1080 pixels. While it provides a good contrast (1,612:1), the brightness (251.4 cd/m²) is too low. We consider a value beyond 300 cd/m² to be good.

The screen flickers at brightness levels of 90% and below. Due to the low frequency of 352 Hz, sensitive users can experience headaches and/or eye problems.


272 cd/m²	257 cd/m²	267 cd/m²
250 cd/m²	266 cd/m²	232 cd/m²
245 cd/m²	253 cd/m²	221 cd/m²

Distribution of brightness

BOE CQ NV156FHM-N48

X-Rite i1Pro 2

Maximum: 272 cd/m² (Nits) Average: 251.4 cd/m² Minimum: 4.1 cd/m²
Brightness Distribution: 81 %
Center on Battery: 266 cd/m²
Contrast: 1612:1 (Black: 0.165 cd/m²)
ΔE Color 6.33 | 0.55-29.43 Ø5.2, calibrated: 5.23
ΔE Greyscale 3.81 | 0.57-98 Ø5.4
57% sRGB (Argyll 1.6.3 3D)
37% AdobeRGB 1998 (Argyll 1.6.3 3D)
40.35% AdobeRGB 1998 (Argyll 2.2.0 3D)
57.3% sRGB (Argyll 2.2.0 3D)
39.05% Display P3 (Argyll 2.2.0 3D)
Gamma: 2.38

Download ICC File (X-Rite i1Pro 2)

	Lenovo Ideapad C340-15IWL-81N5004QGE IPS, 1920x1080, 15.60	HP Envy x360 15-bq102ng IPS, 1920x1080, 15.60	Dell Inspiron 15 5579-9672 IPS, 1920x1080, 15.60
Display		7%	-4%
Display P3 Coverage	39.05	41.36 6%	37 -5%
sRGB Coverage	57.3	62.2 9%	55.6 -3%
AdobeRGB 1998 Coverage	40.35	42.74 6%	38.23 -5%
Response Times		2351%	20%
Response Time Grey 50% / Grey 80% *	57 ?(26, 31)	40 ?(22, 18) 30%	41 ?(19, 22) 28%
Response Time Black / White *	33 ?(19, 14)	26 ?(14, 12) 21%	29 ?(17, 12) 12%
PWM Frequency	352 ?(90)	25000 ?(30) 7002%
Screen		18%	3%
Brightness middle	266	221 -17%	251 -6%
Brightness	251	207 -18%	240 -4%
Brightness Distribution	81	87 7%	84 4%
Black Level *	0.165	0.15 9%	0.2 -21%
Contrast	1612	1473 -9%	1255 -22%
Colorchecker dE 2000 *	6.33	4.35 31%	5.25 17%
Colorchecker dE 2000 max. *	21.03	8.98 57%	10.04 52%
Colorchecker dE 2000 calibrated *	5.23
Greyscale dE 2000 *	3.81	3.09 19%	3.28 14%
Gamma	2.38 ^92%	2.23 ^99%	2.15 ^102%
CCT	6057 ^107%	6068 ^107%	6502 ^100%
Color Space (Percent of AdobeRGB 1998)	37	56 51%	35 -5%
Color Space (Percent of sRGB)	57	86 51%	55 -4%
Total Average (Program / Settings)		792% / 453%	6% / 3%

* ... smaller is better

Display Response Times

ℹ

Display response times show how fast the screen is able to change from one color to the next. Slow response times can lead to afterimages and can cause moving objects to appear blurry (ghosting). Gamers of fast-paced 3D titles should pay special attention to fast response times.

↔ Response Time Black to White
33 ms ... rise ↗ and fall ↘ combined	↗ 19 ms rise
33 ms ... rise ↗ and fall ↘ combined	↘ 14 ms fall
The screen shows slow response rates in our tests and will be unsatisfactory for gamers. In comparison, all tested devices range from 0.1 (minimum) to 240 (maximum) ms. » 87 % of all devices are better. This means that the measured response time is worse than the average of all tested devices (22.3 ms).
↔ Response Time 50% Grey to 80% Grey
57 ms ... rise ↗ and fall ↘ combined	↗ 26 ms rise
57 ms ... rise ↗ and fall ↘ combined	↘ 31 ms fall
The screen shows slow response rates in our tests and will be unsatisfactory for gamers. In comparison, all tested devices range from 0.25 (minimum) to 636 (maximum) ms. » 93 % of all devices are better. This means that the measured response time is worse than the average of all tested devices (35.2 ms).

Screen Flickering / PWM (Pulse-Width Modulation)

ℹ

To dim the screen, some notebooks will simply cycle the backlight on and off in rapid succession - a method called Pulse Width Modulation (PWM) . This cycling frequency should ideally be undetectable to the human eye. If said frequency is too low, users with sensitive eyes may experience strain or headaches or even notice the flickering altogether.

Screen flickering / PWM detected

352 Hz

≤ 90 % brightness setting

The display backlight flickers at 352 Hz (Likely utilizing PWM) Flickering detected at a brightness setting of 90 % and below. There should be no flickering or PWM above this brightness setting.

The frequency of 352 Hz is relatively high, so most users sensitive to PWM should not notice any flickering. However, there are reports that some users are still sensitive to PWM at 500 Hz and above, so be aware.

In comparison: 53 % of all tested devices do not use PWM to dim the display. If PWM was detected, an average of 18889 (minimum: 5 - maximum: 3846000) Hz was measured.

Out of the box, we register a DeltaE 2000 color deviation of 6.33. This misses the target (DeltaE smaller than 3). Calibration can be used to slightly improve the color reproduction, making the color deviation drop to a value of 5.23 and the grayscales be displayed in a more balanced way. The display isn't able to map the AdobeRGB (37%) and sRGB (57%) color spaces.

The IPS panel can be read from any position due to its stable viewing angles. Outdoors, due to the low maximum brightness and the glossy display surface, the screen can barely be read or not be read at all.

Performance - The C340-15IWL houses mid-range hardware

Lenovo's 15.6-inch convertible has enough computing power for office and Internet applications. The dedicated graphics core allows playing games in a limited way. Our test device is available for about 750 to 800 Euros (~$833 to ~$888). Other configuration options are available. Prices start at 500 Euros (~$555).

Processor

The IdeaPad is powered by a Core i5-8265U quad-core processor (Whiskey Lake). The CPU operates at a base speed of 1.6 GHz. Turbo can be used to increase it to 3.7 GHz (all four cores), 3.8 GHz (two cores) and 3.9 GHz (one core), respectively.

The processor works through the multithread tests of the Cinebench benchmarks at 3.7 GHz for several seconds. The clock speed then drops slowly and gradually to 3.2 to 3.3 GHz. The single-thread tests are processed at 3.7 to 3.9 GHz. This behavior is observed both on battery power and when plugged in.

We test whether Turbo is also used consistently by running Cinebench's R15 multithread test continuously in a loop for a about 30 minutes. Turbo is used, but to a different extent in each run. The diagram illustrates the uneven performance development.

A more consistent performance development (see diagram) can be achieved by turning off the "Smart Cooling" feature within the Lenovo Vantage software and turning on the "Performance" temperature mode.

Lenovo Ideapad C340-15IWL-81N5004QGE Intel Core i5-8265U, Intel Core i5-8265U: Ø582 (501.37-748)

HP Envy x360 15-bq102ng AMD Ryzen 5 2500U, AMD Ryzen 5 2500U: Ø561 (552.26-618.11)

Dell Inspiron 15 5579-9672 Intel Core i5-8250U, Intel Core i5-8250U: Ø503 (479.16-561.5)

Lenovo Ideapad C340-15IWL-81N5004QGE Intel Core i5-8265U, Intel Core i5-8265U; intelligente Kuehlung deaktiviert: Ø564 (549.1-743)

CPU clock speeds while running the CB15 loop

CPU clock speeds while running the CB15 loop (smart cooling disabled, performance mode)

Cinebench R10 Rendering Single 32Bit

5904

Cinebench R10 Rendering Multiple CPUs 32Bit

22962

Cinebench R10 Shading 32Bit

6748

Cinebench R15 CPU Single 64Bit

154 Points

Cinebench R15 CPU Multi 64Bit

748 Points

Cinebench R15 OpenGL 64Bit

84.5 fps

Cinebench R15 Ref. Match 64Bit

99.6 %

Help

... in comparison

Cinebench R15
CPU Single 64Bit
Average of class Convertible (68.6 - 287, n=83, last 2 years)	203 Points ∼62% +32%
Average Intel Core i5-8265U (111 - 164, n=35)	155 Points ∼47% +1%
Lenovo Ideapad C340-15IWL-81N5004QGE Intel Core i5-8265U	154 Points ∼47%
HP Envy x360 15-bq102ng AMD Ryzen 5 2500U	142 Points ∼43% -8%
Dell Inspiron 15 5579-9672 Intel Core i5-8250U	140 Points ∼43% -9%
CPU Multi 64Bit
Average of class Convertible (110.1 - 3100, n=86, last 2 years)	1137 Points ∼12% +52%
Lenovo Ideapad C340-15IWL-81N5004QGE Intel Core i5-8265U	748 Points ∼8%
HP Envy x360 15-bq102ng AMD Ryzen 5 2500U	618 Points ∼6% -17%
Average Intel Core i5-8265U (457 - 750, n=38)	592 Points ∼6% -21%
Dell Inspiron 15 5579-9672 Intel Core i5-8250U	562 Points ∼6% -25%

Cinebench R10
Rendering Single 32Bit
Average of class Convertible (4088 - 10510, n=10, last 2 years)	7383 Points ∼45% +25%
Average Intel Core i5-8265U (5841 - 6209, n=9)	6044 Points ∼37% +2%
Lenovo Ideapad C340-15IWL-81N5004QGE Intel Core i5-8265U	5904 Points ∼36%
Dell Inspiron 15 5579-9672 Intel Core i5-8250U	5349 Points ∼32% -9%
HP Envy x360 15-bq102ng AMD Ryzen 5 2500U	4473 Points ∼27% -24%
Rendering Multiple CPUs 32Bit
Average of class Convertible (9659 - 53525, n=10, last 2 years)	25658 Points ∼19% +12%
Lenovo Ideapad C340-15IWL-81N5004QGE Intel Core i5-8265U	22962 Points ∼17%
Dell Inspiron 15 5579-9672 Intel Core i5-8250U	19494 Points ∼14% -15%
Average Intel Core i5-8265U (16318 - 22962, n=9)	18952 Points ∼14% -17%
HP Envy x360 15-bq102ng AMD Ryzen 5 2500U	16466 Points ∼12% -28%

Cinebench R20
CPU (Single Core)
Average of class Convertible (116.8 - 773, n=82, last 2 years)	532 Points ∼61% +32%
Lenovo Ideapad C340-15IWL-81N5004QGE Intel Core i5-8265U	403 Points ∼46%
Average Intel Core i5-8265U (325 - 403, n=16)	389 Points ∼45% -3%
CPU (Multi Core)
Average of class Convertible (242 - 7491, n=83, last 2 years)	2572 Points ∼11% +64%
Lenovo Ideapad C340-15IWL-81N5004QGE Intel Core i5-8265U	1564 Points ∼7%
Average Intel Core i5-8265U (972 - 1564, n=16)	1271 Points ∼5% -19%

Geekbench 3
32 Bit Multi-Core Score
Lenovo Ideapad C340-15IWL-81N5004QGE Intel Core i5-8265U	14499 Points ∼18%
Average Intel Core i5-8265U (12198 - 14499, n=6)	13659 Points ∼17% -6%
HP Envy x360 15-bq102ng AMD Ryzen 5 2500U	11301 Points ∼14% -22%
32 Bit Single-Core Score
Lenovo Ideapad C340-15IWL-81N5004QGE Intel Core i5-8265U	3683 Points ∼72%
Average Intel Core i5-8265U (3470 - 3842, n=6)	3669 Points ∼72% 0%
HP Envy x360 15-bq102ng AMD Ryzen 5 2500U	3477 Points ∼68% -6%

Geekbench 4.1 - 4.4
64 Bit Multi-Core Score
Average of class Convertible (3462 - 30452, n=16, last 2 years)	20437 Points ∼23% +33%
Lenovo Ideapad C340-15IWL-81N5004QGE Intel Core i5-8265U	15340 Points ∼17%
Average Intel Core i5-8265U (7144 - 16249, n=19)	13600 Points ∼15% -11%
HP Envy x360 15-bq102ng AMD Ryzen 5 2500U	9835 Points ∼11% -36%
64 Bit Single-Core Score
Average of class Convertible (1989 - 6801, n=16, last 2 years)	4955 Points ∼51% +9%
Lenovo Ideapad C340-15IWL-81N5004QGE Intel Core i5-8265U	4529 Points ∼47%
Average Intel Core i5-8265U (2106 - 4830, n=19)	4387 Points ∼45% -3%
HP Envy x360 15-bq102ng AMD Ryzen 5 2500U	3767 Points ∼39% -17%

Geekbench 5.0
5.0 Multi-Core
Average of class Convertible (1838 - 12205, n=31, last 2 years)	7157 Points ∼23% +84%
Lenovo Ideapad C340-15IWL-81N5004QGE Intel Core i5-8265U	3881 Points ∼12%
Average Intel Core i5-8265U (2973 - 3962, n=6)	3446 Points ∼11% -11%
5.0 Single-Core
Average of class Convertible (868 - 1732, n=31, last 2 years)	1468 Points ∼6% +46%
Average Intel Core i5-8265U (986 - 1041, n=6)	1015 Points ∼4% +1%
Lenovo Ideapad C340-15IWL-81N5004QGE Intel Core i5-8265U	1003 Points ∼4%

Mozilla Kraken 1.1 - Total Score
HP Envy x360 15-bq102ng AMD Ryzen 5 2500U (Edge 41)	1347 ms * ∼2% -11%
Dell Inspiron 15 5579-9672 Intel Core i5-8250U (Edge 42.17134.1.0)	1314 ms * ∼2% -8%
Lenovo Ideapad C340-15IWL-81N5004QGE Intel Core i5-8265U (Edge 44)	1215 ms * ∼1%
Average Intel Core i5-8265U (851 - 1245, n=25)	1141 ms * ∼1% +6%
Average of class Convertible (469 - 3989, n=88, last 2 years)	915 ms * ∼1% +25%

Octane V2 - Total Score
Average of class Convertible (9822 - 92146, n=33, last 2 years)	57712 Points ∼55% +97%
Average Intel Core i5-8265U (12842 - 35563, n=23)	31246 Points ∼30% +6%
Lenovo Ideapad C340-15IWL-81N5004QGE Intel Core i5-8265U (Edge 44)	29343 Points ∼28%
Dell Inspiron 15 5579-9672 Intel Core i5-8250U (Edge 42.17134.1.0)	27438 Points ∼26% -6%
HP Envy x360 15-bq102ng AMD Ryzen 5 2500U (Edge 41)	26832 Points ∼25% -9%

JetStream 1.1 - Total Score
Average of class Convertible (51.9 - 443, n=15, last 2 years)	244 Points ∼45% +7%
Lenovo Ideapad C340-15IWL-81N5004QGE Intel Core i5-8265U (Edge 44)	228.8 Points ∼42%
Average Intel Core i5-8265U (193.7 - 244, n=19)	226 Points ∼42% -1%
Dell Inspiron 15 5579-9672 Intel Core i5-8250U (Edge 42.17134.1.0)	211.3 Points ∼39% -8%
HP Envy x360 15-bq102ng AMD Ryzen 5 2500U (Edge 41)	193 Points ∼36% -16%

* ... smaller is better

System performance

The built-in hardware ensures a fast and smooth system. We didn't encounter any problems. The processor provides more than enough computing power for office and Internet applications. The dedicated graphics core allows playing computer games to a limited extent. This is complemented by good PCMark results.

PCMark 8 Home Score Accelerated v2		3639 points
PCMark 8 Creative Score Accelerated v2		3741 points
PCMark 8 Work Score Accelerated v2		4837 points
PCMark 10 Score		4104 points
Help

PCMark 10 | PCMark 8

PCMark 10
Score
Average of class Convertible (1429 - 7884, n=68, last 2 years)	5005 Points ∼49% +22%
Lenovo Ideapad C340-15IWL-81N5004QGE GeForce MX230, i5-8265U, SK hynix BC501 HFM128GDJTNG-831	4104 Points ∼40%
Average Intel Core i5-8265U, NVIDIA GeForce MX230 (3764 - 4104, n=3)	3905 Points ∼38% -5%
HP Envy x360 15-bq102ng Vega 8, R5 2500U, Samsung PM961 MZVLW256HEHP	2944 Points ∼29% -28%
Dell Inspiron 15 5579-9672 UHD Graphics 620, i5-8250U, SK hynix SC311 SATA	2208 Points ∼22% -46%
Essentials
Average of class Convertible (3602 - 12059, n=68, last 2 years)	9743 Points ∼75% +11%
Lenovo Ideapad C340-15IWL-81N5004QGE GeForce MX230, i5-8265U, SK hynix BC501 HFM128GDJTNG-831	8799 Points ∼68%
Average Intel Core i5-8265U, NVIDIA GeForce MX230 (7981 - 8799, n=3)	8298 Points ∼64% -6%
Dell Inspiron 15 5579-9672 UHD Graphics 620, i5-8250U, SK hynix SC311 SATA	6349 Points ∼49% -28%
HP Envy x360 15-bq102ng Vega 8, R5 2500U, Samsung PM961 MZVLW256HEHP	6236 Points ∼48% -29%
Productivity
Average of class Convertible (2411 - 10222, n=68, last 2 years)	6783 Points ∼54% +6%
Average Intel Core i5-8265U, NVIDIA GeForce MX230 (6380 - 6755, n=3)	6508 Points ∼52% +2%
Lenovo Ideapad C340-15IWL-81N5004QGE GeForce MX230, i5-8265U, SK hynix BC501 HFM128GDJTNG-831	6390 Points ∼51%
Dell Inspiron 15 5579-9672 UHD Graphics 620, i5-8250U, SK hynix SC311 SATA	4811 Points ∼38% -25%
HP Envy x360 15-bq102ng Vega 8, R5 2500U, Samsung PM961 MZVLW256HEHP	3901 Points ∼31% -39%
Digital Content Creation
Average of class Convertible (811 - 11272, n=68, last 2 years)	5253 Points ∼26% +57%
Lenovo Ideapad C340-15IWL-81N5004QGE GeForce MX230, i5-8265U, SK hynix BC501 HFM128GDJTNG-831	3337 Points ∼17%
Average Intel Core i5-8265U, NVIDIA GeForce MX230 (2685 - 3337, n=3)	3003 Points ∼15% -10%
HP Envy x360 15-bq102ng Vega 8, R5 2500U, Samsung PM961 MZVLW256HEHP	2848 Points ∼14% -15%
Dell Inspiron 15 5579-9672 UHD Graphics 620, i5-8250U, SK hynix SC311 SATA	2656 Points ∼13% -20%

PCMark 8 - Home Score Accelerated v2
Average of class Convertible (3057 - 5032, n=7, last 2 years)	4269 Points ∼64% +17%
Lenovo Ideapad C340-15IWL-81N5004QGE GeForce MX230, i5-8265U, SK hynix BC501 HFM128GDJTNG-831	3639 Points ∼55%
Average Intel Core i5-8265U, NVIDIA GeForce MX230 (3609 - 3639, n=2)	3624 Points ∼54% 0%
HP Envy x360 15-bq102ng Vega 8, R5 2500U, Samsung PM961 MZVLW256HEHP	3462 Points ∼52% -5%
Dell Inspiron 15 5579-9672 UHD Graphics 620, i5-8250U, SK hynix SC311 SATA	3370 Points ∼51% -7%

Storage

The system drive is an NVMe SSD (M.2 2242 format) from SK Hynix, which provides 128 GB of storage space (95 GB usable). Transfer rates are good, but the SSD isn't among the fastest models. There's also a 2.5-inch hard drive inside the laptop (1 TB).

CrystalDiskMark 3.0

CrystalDiskMark 5.2 / 6

AS SSD

SK hynix BC501 HFM128GDJTNG-831

Sequential Read: 907 MB/s

Sequential Write: 266.8 MB/s

512K Read: 742 MB/s

512K Write: 207.9 MB/s

4K Read: 42.38 MB/s

4K Write: 124.1 MB/s

4K QD32 Read: 271 MB/s

4K QD32 Write: 202.9 MB/s

	Lenovo Ideapad C340-15IWL-81N5004QGE SK hynix BC501 HFM128GDJTNG-831	HP Envy x360 15-bq102ng Samsung PM961 MZVLW256HEHP	Dell Inspiron 15 5579-9672 SK hynix SC311 SATA	Average SK hynix BC501 HFM128GDJTNG-831	Average of class Convertible
CrystalDiskMark 5.2 / 6		96%	-22%	-7%	179%
Write 4K	105	116 10%	48.25 -54%	108.2 ?(90.3 - 129.3, n=3) 3%	147.7 ?(21.6 - 307, n=57, last 2 years) 41%
Read 4K	39.72	42.73 8%	23.77 -40%	39.3 ?(37 - 41, n=3) -1%	55.9 ?(16.4 - 95.8, n=57, last 2 years) 41%
Write Seq	326.9	1222 274%	444.9 36%	284 ?(203 - 327, n=3) -13%	1746 ?(139.1 - 4570, n=44, last 2 years) 434%
Read Seq	1033	1608 56%	497.5 -52%	772 ?(271 - 1033, n=3) -25%	1933 ?(256 - 4673, n=44, last 2 years) 87%
Write 4K Q32T1	269.1	280.1 4%	223.5 -17%	239 ?(196.8 - 269, n=3) -11%	363 ?(25 - 694, n=57, last 2 years) 35%
Read 4K Q32T1	284.8	333.6 17%	171.8 -40%	279 ?(272 - 285, n=3) -2%	443 ?(17.9 - 892, n=57, last 2 years) 56%
Write Seq Q32T1	321	1291 302%	511 59%	303 ?(269 - 321, n=3) -6%	2366 ?(152.6 - 5232, n=57, last 2 years) 637%
Read Seq Q32T1	1606	3183 98%	553 -66%	1597 ?(1589 - 1606, n=3) -1%	3279 ?(214 - 7131, n=57, last 2 years) 104%

Graphics card

The built-in GeForce MX230 graphics core (Pascal) supports DirectX 12 and can access fast GDDR5 memory (2,048 MB). The 3DMark results are at a normal level for the GPU. The UHD Graphics 620 GPU that's integrated into the processor is active, and the laptop works with Nvidia's Optimus graphics-switching solution.

The MX230 has a base speed of 1,519 MHz. An increase to up to 1,531 MHz is possible through Boost. Higher speeds are feasible if the GPU doesn't reach a set temperature and/or energy threshold. In this way, it processes the "Witcher 3" test at an average speed of 1,628 MHz. The maximum speed we measured is 1,734 MHz.

3DMark 11 Performance		3720 points
3DMark Ice Storm Standard Score		79069 points
3DMark Cloud Gate Standard Score		11659 points
3DMark Fire Strike Score		2531 points
3DMark Time Spy Score		937 points
Help

... in comparison

3DMark 11 | 3DMark

3DMark 11 - 1280x720 Performance GPU
Average of class Convertible (471 - 35821, n=77, last 2 years)	5958 Points ∼100% +68%
HP Envy x360 15-bq102ng AMD Radeon RX Vega 8 (Ryzen 2000/3000), AMD Ryzen 5 2500U	3549 Points ∼60% 0%
Lenovo Ideapad C340-15IWL-81N5004QGE NVIDIA GeForce MX230, Intel Core i5-8265U	3547 Points ∼60%
Average NVIDIA GeForce MX230 (3180 - 3582, n=6)	3392 Points ∼57% -4%
Dell Inspiron 15 5579-9672 Intel UHD Graphics 620, Intel Core i5-8250U	1529 Points ∼26% -57%

3DMark
1920x1080 Fire Strike Graphics
Average of class Convertible (365 - 25057, n=78, last 2 years)	4417 Points ∼100% +60%
Lenovo Ideapad C340-15IWL-81N5004QGE NVIDIA GeForce MX230, Intel Core i5-8265U	2755 Points ∼62%
Average NVIDIA GeForce MX230 (2168 - 2755, n=6)	2479 Points ∼56% -10%
HP Envy x360 15-bq102ng AMD Radeon RX Vega 8 (Ryzen 2000/3000), AMD Ryzen 5 2500U	2310 Points ∼52% -16%
Dell Inspiron 15 5579-9672 Intel UHD Graphics 620, Intel Core i5-8250U	997 Points ∼23% -64%
1280x720 Cloud Gate Standard Graphics
Average of class Convertible (2965 - 138295, n=69, last 2 years)	25597 Points ∼100% +48%
Lenovo Ideapad C340-15IWL-81N5004QGE NVIDIA GeForce MX230, Intel Core i5-8265U	17256 Points ∼67%
Average NVIDIA GeForce MX230 (13376 - 17999, n=6)	15921 Points ∼62% -8%
HP Envy x360 15-bq102ng AMD Radeon RX Vega 8 (Ryzen 2000/3000), AMD Ryzen 5 2500U	15186 Points ∼59% -12%
Dell Inspiron 15 5579-9672 Intel UHD Graphics 620, Intel Core i5-8250U	8112 Points ∼32% -53%
2560x1440 Time Spy Graphics
Average of class Convertible (94 - 10488, n=75, last 2 years)	1472 Points ∼100% +76%
Lenovo Ideapad C340-15IWL-81N5004QGE NVIDIA GeForce MX230, Intel Core i5-8265U	837 Points ∼57%
Average NVIDIA GeForce MX230 (698 - 837, n=4)	758 Points ∼51% -9%
HP Envy x360 15-bq102ng AMD Radeon RX Vega 8 (Ryzen 2000/3000), AMD Ryzen 5 2500U	649 Points ∼44% -22%
Dell Inspiron 15 5579-9672 Intel UHD Graphics 620, Intel Core i5-8250U	317 Points ∼22% -62%

Gaming performance

The built-in combination of CPU and GPU allows many computer games to run smoothly at HD resolution (1366x768 pixels) and medium quality settings. Games with low hardware requirements can use higher settings. It gets hard with many - not all - titles of the years 2018/2019. A decrease in resolution and/or quality level is often not enough to generate sufficiently high frame rates here.

BioShock Infinite | The Witcher 3 | Total War: Three Kingdoms | FIFA 20

BioShock Infinite - 1366x768 High Preset
Lenovo Ideapad C340-15IWL-81N5004QGE Intel Core i5-8265U, NVIDIA GeForce MX230	79.8 fps ∼100%
Average NVIDIA GeForce MX230 (61.8 - 79.8, n=5)	72.7 fps ∼91% -9%
HP Envy x360 15-bq102ng AMD Ryzen 5 2500U, AMD Radeon RX Vega 8 (Ryzen 2000/3000)	58.5 fps ∼73% -27%
Dell Inspiron 15 5579-9672 Intel Core i5-8250U, Intel UHD Graphics 620	22.4 fps ∼28% -72%

The Witcher 3 - 1024x768 Low Graphics & Postprocessing
Average of class Convertible (4 - 186.1, n=63, last 2 years)	75.1 fps ∼100% +55%
Lenovo Ideapad C340-15IWL-81N5004QGE Intel Core i5-8265U, NVIDIA GeForce MX230	48.4 fps ∼64%
Average NVIDIA GeForce MX230 (45.9 - 48.4, n=2)	47.2 fps ∼63% -2%
Dell Inspiron 15 5579-9672 Intel Core i5-8250U, Intel UHD Graphics 620	15.2 fps ∼20% -69%

Total War: Three Kingdoms - 1280x720 Low (incl textures)
Lenovo Ideapad C340-15IWL-81N5004QGE Intel Core i5-8265U, NVIDIA GeForce MX230	67.7 (28^min - 81^max) fps ∼100%
Average NVIDIA GeForce MX230 (55.5 - 67.7, n=3)	61.4 fps ∼91% -9%

FIFA 20 - 1920x1080 Ultra Preset AA:4xMS
Lenovo Ideapad C340-15IWL-81N5004QGE Intel Core i5-8265U, NVIDIA GeForce MX230	46.4 fps ∼100%
Average NVIDIA GeForce MX230	46.4 fps ∼100% 0%

In order to verify that the frame rates also remain largely constant over a prolonged period of time, we let the game "The Witcher 3" run for about 60 minutes at Full HD resolution and maximum quality settings. The character embodied by the player isn't moved over this entire period. A drop in frame rates is not observed.

Lenovo Ideapad C340-15IWL-81N5004QGE GeForce MX230, i5-8265U, SK hynix BC501 HFM128GDJTNG-831: Ø8.6 (3-10)

GPU measurements during the Witcher 3 test

	low	med.	high	ultra
BioShock Infinite (2013)	168.1	90.6	79.8	31.2
The Witcher 3 (2015)	48.4	28.4	15.9	9.9
Batman: Arkham Knight (2015)	44	38	16	11
Total War: Three Kingdoms (2019)	67.7	19.2	9	5.1
Control (2019)	34.8	11	7.5
Borderlands 3 (2019)	39.6	16	10.1	7.4
FIFA 20 (2019)	73.1	62.4	55.6	46.4
Ghost Recon Breakpoint (2019)	28	14	13	9
GRID 2019 (2019)	46.8	19.2	12.4

Emissions and energy - The Lenovo computer has a lot of stamina

Noise emissions

The Lenovo C340 doesn't produce much noise over the entire load range. When idle, the fan is often off and silence prevails - unless the 2.5-inch hard drive is accessed. Under full load, the fan turns up a little. We measure a sound pressure level of only 36.8 dB(A) during the stress test.

Noise Level

Idle		30.6 / 30.6 / 30.6 dB(A)
HDD		31.7 dB(A)
Load		36.4 / 36.8 dB(A)

	30 dB silent 40 dB(A) audible 50 dB(A) loud
min: , med: , max: Audix TM1, Arta (15 cm distance) environment noise: 30.3 dB(A)

Temperature

Our stress test (Prime95 and FurMark run for at least an hour) is processed by the Lenovo computer in slightly different ways on battery power and when plugged in. The processor runs at speeds between 500 and 900 MHz. The graphics core works at 1,400 to 1,500 MHz. On battery power, the CPU clock speed jumps back and forth between 400 MHz and 3.7 GHz. The GPU operates at speeds around 1,700 MHz. The stress test represents an extreme scenario that doesn't occur in everyday life. With this test, we verify that the system remains stable even under full load.

The convertible doesn't get particularly warm. During the stress test, we only register a temperature just above 40 °C (~104 °F) at one measuring point. In everyday use, the values are in the green area.

Max. Load

Idle


38.2 °C 101 F	40.3 °C 105 F	34.5 °C 94 F
37.1 °C 99 F	39 °C 102 F	27.7 °C 82 F
29.3 °C 85 F	25.8 °C 78 F	25.9 °C 79 F

Maximum: 40.3 °C = 105 F
Average: 33.1 °C = 92 F


29.7 °C 85 F	27.6 °C 82 F	37.4 °C 99 F
25.7 °C 78 F	35 °C 95 F	36.1 °C 97 F
25 °C 77 F	26 °C 79 F	28.5 °C 83 F

Maximum: 37.4 °C = 99 F
Average: 30.1 °C = 86 F

Power Supply (max.) 40.5 °C = 105 F | Room Temperature 22.1 °C = 72 F | FIRT 550-Pocket

(±) The average temperature for the upper side under maximal load is 33.1 °C / 92 F, compared to the average of 30.2 °C / 86 F for the devices in the class Convertible.
(±) The maximum temperature on the upper side is 40.3 °C / 105 F, compared to the average of 35.3 °C / 96 F, ranging from 19.6 to 55.7 °C for the class Convertible.
(+) The bottom heats up to a maximum of 37.4 °C / 99 F, compared to the average of 36.7 °C / 98 F
(+) In idle usage, the average temperature for the upper side is 24.4 °C / 76 F, compared to the device average of 30.2 °C / 86 F.
(+) The palmrests and touchpad are cooler than skin temperature with a maximum of 29.3 °C / 84.7 F and are therefore cool to the touch.
(±) The average temperature of the palmrest area of similar devices was 28.2 °C / 82.8 F (-1.1 °C / -1.9 F).

Speakers

The stereo speakers are placed in the front area of the device's bottom. They produce a decent sound, but bass is largely missing.