GeForce 840A vs 940MX

Place in the ranking	691	773
Place by popularity	not in top-100	not in top-100
Power efficiency	11.83	6.23
Architecture	Maxwell (2014−2017)	Maxwell (2014−2017)
GPU code name	GM107	GM108
Market segment	Laptop	Laptop
Release date	28 June 2016 (8 years ago)	17 March 2014 (10 years ago)

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	1029 MHz
Boost clock speed	861 MHz	1124 MHz
Number of transistors	1,870 million	no data
Manufacturing process technology	28 nm	28 nm
Power consumption (TDP)	23 Watt	33 Watt
Texture fill rate	27.55	17.98
Floating-point processing power	0.8817 TFLOPS	0.8632 TFLOPS
ROPs	8	8
TMUs	32	16

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 x8
Supplementary power connectors	None	no data

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	64 Bit
Memory clock speed	1253 MHz	1001 MHz
Memory bandwidth	40.1 GB/s	16.02 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

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	+	5.0

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
+32.3%

GeForce 840A 2.97

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 1518
+32.6%

GeForce 840A 1145

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 6348
+13.4%

GeForce 840A 5596

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%

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 +42%	50−55 −42%
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 GeForce 840A 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	2.97
Recency	28 June 2016	17 March 2014
Maximum RAM amount	4 GB	2 GB
Power consumption (TDP)	23 Watt	33 Watt

GeForce 940MX has a 32.3% higher aggregate performance score, an age advantage of 2 years, a 100% higher maximum VRAM amount, and 43.5% lower power consumption.

The GeForce 940MX is our recommended choice as it beats the GeForce 840A in performance tests.

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