GeForce GT 640 vs 940MX

Place in the ranking	696	767
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	0.20
Power efficiency	11.91	3.27
Architecture	Maxwell (2014−2017)	Kepler (2012−2018)
GPU code name	GM107	GK107
Market segment	Laptop	Desktop
Release date	28 June 2016 (8 years ago)	5 June 2012 (12 years ago)
Launch price (MSRP)	no data	$99

Cost-effectiveness evaluation

Performance to price ratio. The higher, the better.

no data

Detailed specifications

General parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.

Pipelines / CUDA cores	512	384
Core clock speed	795 MHz	902 MHz
Boost clock speed	861 MHz	no data
Number of transistors	1,870 million	1,270 million
Manufacturing process technology	28 nm	28 nm
Power consumption (TDP)	23 Watt	65 Watt
Texture fill rate	27.55	28.86
Floating-point processing power	0.8817 TFLOPS	0.6927 TFLOPS
ROPs	8	16
TMUs	32	32

Form factor & compatibility

Information on compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop graphics cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility).

Laptop size	medium sized	no data
Bus support	PCI Express 3.0	no data
Interface	PCIe 3.0 x8	PCIe 3.0 x16
Length	no data	145 mm
Width	no data	1-slot
Supplementary power connectors	None	None

VRAM capacity and type

Parameters of VRAM installed: its type, size, bus, clock and resulting bandwidth. Integrated GPUs have no dedicated video RAM and use a shared part of system RAM.

Memory type	DDR3, GDDR5	DDR3
Maximum RAM amount	4 GB	2 GB
Memory bus width	64 Bit	128 Bit
Memory clock speed	1253 MHz	891 MHz
Memory bandwidth	40.1 GB/s	28.51 GB/s
Shared memory	-	no data

Connectivity and outputs

Types and number of video connectors present on the reviewed GPUs. As a rule, data in this section is precise only for desktop reference ones (so-called Founders Edition for NVIDIA chips). OEM manufacturers may change the number and type of output ports, while for notebook cards availability of certain video outputs ports depends on the laptop model rather than on the card itself.

Display Connectors	No outputs	1x DVI, 1x HDMI, 1x DisplayPort
HDMI	-	+

Supported technologies

Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.

GPU Boost	2.0	no data
Optimus	+	-
GameWorks	+	-

API compatibility

List of supported 3D and general-purpose computing APIs, including their specific versions.

DirectX	12 (11_0)	12 (11_0)
Shader Model	5.1	5.1
OpenGL	4.5	4.6
OpenCL	1.2	1.2
Vulkan	1.1.126	1.1.126
CUDA	+	3.0

Synthetic benchmark performance

Non-gaming benchmark results comparison. The combined score is measured on a 0-100 point scale.

Combined synthetic benchmark score

This is our combined benchmark score. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

GeForce 940MX 3.93
+28.9%

GT 640 3.05

Passmark

This is the most ubiquitous GPU benchmark. It gives the graphics card a thorough evaluation under various types of load, providing four separate benchmarks for Direct3D versions 9, 10, 11 and 12 (the last being done in 4K resolution if possible), and few more tests engaging DirectCompute capabilities.

GeForce 940MX 1517
+29.1%

GT 640 1175

3DMark Fire Strike Graphics

Fire Strike is a DirectX 11 benchmark for gaming PCs. It features two separate tests displaying a fight between a humanoid and a fiery creature made of lava. Using 1920x1080 resolution, Fire Strike shows off some realistic graphics and is quite taxing on hardware.

GeForce 940MX 1996
+27.9%

GT 640 1560

GeekBench 5 OpenCL

Geekbench 5 is a widespread graphics card benchmark combined from 11 different test scenarios. All these scenarios rely on direct usage of GPU's processing power, no 3D rendering is involved. This variation uses OpenCL API by Khronos Group.

GeForce 940MX 6327
+69.4%

GT 640 3736

GeekBench 5 Vulkan

GeForce 940MX 5001
+35.8%

GT 640 3683

GeekBench 5 CUDA

GeForce 940MX 6290
+120%

GT 640 2853

Octane Render OctaneBench

This is a special benchmark measuring graphics card performance in OctaneRender, which is a realistic GPU rendering engine by OTOY Inc., available either as a standalone program, or as a plugin for 3DS Max, Cinema 4D and many other apps. It renders four different static scenes, then compares render times with a reference GPU which is currently GeForce GTX 980. This benchmark has nothing to do with gaming and is aimed at professional 3D graphics artists.

GeForce 940MX 17
+70%

GT 640 10

Gaming performance

Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.

Average FPS across all PC games

Here are the average frames per second in a large set of popular games across different resolutions:

Full HD	17 +41.7%	12−14 −41.7%
4K	10 +42.9%	7−8 −42.9%

Cost per frame, $

1080p	no data	8.25
4K	no data	14.14

FPS performance in popular games

Full HD
Low Preset

Cyberpunk 2077

7−8
+40%

5−6

−40%

Full HD
Medium Preset

Assassin's Creed Odyssey	11 +37.5%	8−9 −37.5%
Assassin's Creed Valhalla	3−4 +50%	2−3 −50%
Battlefield 5	14 +40%	10−11 −40%
Call of Duty: Modern Warfare	9−10 +50%	6−7 −50%
Cyberpunk 2077	7−8 +40%	5−6 −40%
Far Cry 5	11 +37.5%	8−9 −37.5%
Far Cry New Dawn	10−12 +37.5%	8−9 −37.5%
Forza Horizon 4	71 +29.1%	55−60 −29.1%
Hitman 3	9−10 +50%	6−7 −50%
Horizon Zero Dawn	27−30 +50%	18−20 −50%
Metro Exodus	7−8 +40%	5−6 −40%
Red Dead Redemption 2	10−11 +42.9%	7−8 −42.9%
Shadow of the Tomb Raider	19 +35.7%	14−16 −35.7%
Watch Dogs: Legion	40−45 +40%	30−33 −40%

Full HD
High Preset

Assassin's Creed Odyssey	14 +40%	10−11 −40%
Assassin's Creed Valhalla	3−4 +50%	2−3 −50%
Battlefield 5	10 +42.9%	7−8 −42.9%
Call of Duty: Modern Warfare	9−10 +50%	6−7 −50%
Cyberpunk 2077	7−8 +40%	5−6 −40%
Far Cry 5	11 +37.5%	8−9 −37.5%
Far Cry New Dawn	10−12 +37.5%	8−9 −37.5%
Forza Horizon 4	41 +36.7%	30−33 −36.7%
Hitman 3	9−10 +50%	6−7 −50%
Horizon Zero Dawn	27−30 +50%	18−20 −50%
Metro Exodus	7−8 +40%	5−6 −40%
Red Dead Redemption 2	10−11 +42.9%	7−8 −42.9%
Shadow of the Tomb Raider	14−16 +50%	10−11 −50%
The Witcher 3: Wild Hunt	30 +42.9%	21−24 −42.9%
Watch Dogs: Legion	40−45 +40%	30−33 −40%

Full HD
Ultra Preset

Assassin's Creed Odyssey	5 +66.7%	3−4 −66.7%
Assassin's Creed Valhalla	3−4 +50%	2−3 −50%
Call of Duty: Modern Warfare	9−10 +50%	6−7 −50%
Cyberpunk 2077	7−8 +40%	5−6 −40%
Far Cry 5	8 +33.3%	6−7 −33.3%
Forza Horizon 4	12 +33.3%	9−10 −33.3%
Hitman 3	9−10 +50%	6−7 −50%
Horizon Zero Dawn	11 +37.5%	8−9 −37.5%
Shadow of the Tomb Raider	14−16 +50%	10−11 −50%
The Witcher 3: Wild Hunt	7 +40%	5−6 −40%
Watch Dogs: Legion	40−45 +40%	30−33 −40%

Full HD
Epic Preset

Red Dead Redemption 2

10−11

+42.9%

7−8
−42.9%

1440p
High Preset

Battlefield 5	7−8 +40%	5−6 −40%
Far Cry New Dawn	6−7 +50%	4−5 −50%

1440p
Ultra Preset

Assassin's Creed Odyssey	4−5 +33.3%	3−4 −33.3%
Call of Duty: Modern Warfare	3−4 +50%	2−3 −50%
Cyberpunk 2077	2−3 +100%	1−2 −100%
Far Cry 5	4−5 +33.3%	3−4 −33.3%
Forza Horizon 4	4−5 +33.3%	3−4 −33.3%
Hitman 3	8−9 +33.3%	6−7 −33.3%
Horizon Zero Dawn	9−10 +50%	6−7 −50%
The Witcher 3: Wild Hunt	3−4 +50%	2−3 −50%
Watch Dogs: Legion	24−27 +33.3%	18−20 −33.3%

1440p
Epic Preset

Red Dead Redemption 2

8−9
+33.3%

6−7

−33.3%

4K
High Preset

Battlefield 5	2−3 +100%	1−2 −100%
Far Cry New Dawn	2−3 +100%	1−2 −100%
Hitman 3	0−1	0−1
Metro Exodus	0−1	0−1

4K
Ultra Preset

Assassin's Creed Odyssey	3−4 +50%	2−3 −50%
Assassin's Creed Valhalla	2−3 +100%	1−2 −100%
Call of Duty: Modern Warfare	1−2	0−1
Cyberpunk 2077	0−1	0−1
Far Cry 5	2−3 +100%	1−2 −100%
Forza Horizon 4	2−3 +100%	1−2 −100%
Watch Dogs: Legion	1−2	0−1

4K
Epic Preset

Red Dead Redemption 2

5−6
+66.7%

3−4

−66.7%

This is how GeForce 940MX and GT 640 compete in popular games:

GeForce 940MX is 42% faster in 1080p
GeForce 940MX is 43% faster in 4K

Pros & cons summary

Performance score	3.93	3.05
Recency	28 June 2016	5 June 2012
Maximum RAM amount	4 GB	2 GB
Power consumption (TDP)	23 Watt	65 Watt

GeForce 940MX has a 28.9% higher aggregate performance score, an age advantage of 4 years, a 100% higher maximum VRAM amount, and 182.6% lower power consumption.

The GeForce 940MX is our recommended choice as it beats the GeForce GT 640 in performance tests.

Be aware that GeForce 940MX is a notebook card while GeForce GT 640 is a desktop one.

Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.