GeForce 840A vs Mobility Radeon HD 3870 X2
If you are going to buy a new graphics card and are choosing between GeForce 840A and Mobility Radeon HD 3870 X2, there are a couple of things to consider. Cards with more VRAM in general perform better and allow you to play on higher graphics settings. Size also makes a difference. A model with a large heatsink can occupy up to three expansion slots on a motherboard. Be sure you have enough room in your PC case. When comparing GPUs with different architectures, more processing cores and even higher TFLOPS will not always translate to better performance. To help you decide which GPU you need, we have measured frame rates in a number of popular games. For more on how the GeForce 840A stacks up against Mobility Radeon HD 3870 X2, check out specs charts below.
GeForce 840A
Mobility Radeon HD 3870 X2 is a Laptop Graphics Card
Note: Mobility Radeon HD 3870 X2 is only used in laptop graphics. It has lower GPU clock speed compared to the desktop variant, which results in lower power consumption, but also 10-30% lower gaming performance. Check available laptop models with Mobility Radeon HD 3870 X2 here:
Main Specs
GeForce 840A | Mobility Radeon HD 3870 X2 | |
Power consumption (TDP) | 33 Watt | 110 Watt |
Interface | PCIe 3.0 x8 | PCIe 2.0 x16 |
Memory type | DDR3 | GDDR3 |
Maximum RAM amount | 2 GB | 512 MB |
Display Connectors | No outputs | No outputs |
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- Mobility Radeon HD 3870 X2 has 233% more power consumption, than GeForce 840A.
- GeForce 840A is connected by PCIe 3.0 x8, and Mobility Radeon HD 3870 X2 uses PCIe 2.0 x16 interface.
- Mobility Radeon HD 3870 X2 has 510 GB more memory, than GeForce 840A.
- GeForce 840A is used in Desktops, and Mobility Radeon HD 3870 X2 - in Laptops.
- GeForce 840A is build with Maxwell architecture, and Mobility Radeon HD 3870 X2 - with RV6xx.
- Core clock speed of GeForce 840A is 369 MHz higher, than Mobility Radeon HD 3870 X2.
- GeForce 840A is manufactured by 28 nm process technology, and Mobility Radeon HD 3870 X2 - by 55 nm process technology.
- Memory clock speed of GeForce 840A is 1152 MHz higher, than Mobility Radeon HD 3870 X2.
Game benchmarks
high / 1080p | 3−4 | 6−7 |
ultra / 1080p | 2−3 | 4−5 |
QHD / 1440p | 0−1 | 0−1 |
low / 720p | 14−16 | 16−18 |
medium / 1080p | 5−6 | 8−9 |
The average gaming FPS of Mobility Radeon HD 3870 X2 in Assassin's Creed Odyssey is 50% more, than GeForce 840A. | ||
high / 1080p | − | 12−14 |
ultra / 1080p | 7−8 | 10−11 |
QHD / 1440p | 0−1 | 0−1 |
low / 720p | 18−20 | 24−27 |
medium / 1080p | 8−9 | 12−14 |
The average gaming FPS of Mobility Radeon HD 3870 X2 in Battlefield 5 is 45% more, than GeForce 840A. | ||
low / 768p | 45−50 | 45−50 |
high / 1080p | 30−35 | 45−50 |
QHD / 1440p | 0−1 | 0−1 |
The average gaming FPS of Mobility Radeon HD 3870 X2 in Call of Duty: Warzone is 17% more, than GeForce 840A. | ||
low / 768p | 120−130 | 130−140 |
medium / 768p | 90−95 | 110−120 |
ultra / 1080p | 40−45 | 50−55 |
QHD / 1440p | 24−27 | 27−30 |
4K / 2160p | 18−20 | 27−30 |
high / 768p | 65−70 | 80−85 |
The average gaming FPS of Mobility Radeon HD 3870 X2 in Counter-Strike: Global Offensive is 17% more, than GeForce 840A. | ||
low / 768p | 80−85 | 55−60 |
ultra / 1080p | 14−16 | 18−20 |
medium / 1080p | 40−45 | 45−50 |
The average gaming FPS of GeForce 840A in Cyberpunk 2077 is 12% more, than Mobility Radeon HD 3870 X2. | ||
low / 768p | 75−80 | 80−85 |
medium / 768p | 50−55 | 55−60 |
ultra / 1080p | 27−30 | 30−35 |
The average gaming FPS of Mobility Radeon HD 3870 X2 in Dota 2 is 9% more, than GeForce 840A. | ||
high / 1080p | 5−6 | 8−9 |
ultra / 1080p | − | 7−8 |
4K / 2160p | 2−3 | 3−4 |
low / 720p | 14−16 | 18−20 |
medium / 1080p | 6−7 | 8−9 |
The average gaming FPS of Mobility Radeon HD 3870 X2 in Far Cry 5 is 28% more, than GeForce 840A. | ||
high / 1080p | 12−14 | 14−16 |
ultra / 1080p | 7−8 | 10−11 |
low / 720p | 50−55 | 60−65 |
medium / 1080p | 14−16 | 21−24 |
The average gaming FPS of Mobility Radeon HD 3870 X2 in Fortnite is 22% more, than GeForce 840A. | ||
high / 1080p | 7−8 | 12−14 |
ultra / 1080p | − | 10−12 |
QHD / 1440p | 0−1 | 1−2 |
low / 720p | 20−22 | 24−27 |
medium / 1080p | 9−10 | 14−16 |
The average gaming FPS of Mobility Radeon HD 3870 X2 in Forza Horizon 4 is 41% more, than GeForce 840A. | ||
low / 768p | 45−50 | 50−55 |
medium / 768p | − | 45−50 |
high / 1080p | 8−9 | 12−14 |
ultra / 1080p | 5−6 | 6−7 |
QHD / 1440p | 0−1 | 0−1 |
medium / 720p | 40−45 | − |
The average gaming FPS of Mobility Radeon HD 3870 X2 in Grand Theft Auto V is 20% more, than GeForce 840A. | ||
high / 1080p | 3−4 | 4−5 |
ultra / 1080p | 1−2 | 3−4 |
4K / 2160p | 0−1 | 0−1 |
low / 720p | 8−9 | 12−14 |
medium / 1080p | 4−5 | 6−7 |
The average gaming FPS of Mobility Radeon HD 3870 X2 in Metro Exodus is 50% more, than GeForce 840A. | ||
low / 768p | 85−90 | 95−100 |
high / 1080p | 85−90 | 85−90 |
ultra / 1080p | 80−85 | 80−85 |
medium / 1080p | 85−90 | 90−95 |
The average gaming FPS of Mobility Radeon HD 3870 X2 in Minecraft is 4% more, than GeForce 840A. | ||
high / 1080p | − | 16−18 |
ultra / 1080p | 12−14 | 14−16 |
low / 720p | 27−30 | 30−35 |
medium / 1080p | 14−16 | 18−20 |
The average gaming FPS of Mobility Radeon HD 3870 X2 in PLAYERUNKNOWN'S BATTLEGROUNDS is 22% more, than GeForce 840A. | ||
ultra / 1080p | 7−8 | 7−8 |
QHD / 1440p | 0−1 | 0−1 |
low / 720p | 8−9 | 12−14 |
medium / 1080p | − | 10−12 |
The average gaming FPS of Mobility Radeon HD 3870 X2 in Red Dead Redemption 2 is 25% more, than GeForce 840A. | ||
low / 768p | 16−18 | 24−27 |
medium / 768p | 12−14 | 16−18 |
high / 1080p | 6−7 | 9−10 |
ultra / 1080p | 5−6 | 6−7 |
4K / 2160p | − | 6−7 |
The average gaming FPS of Mobility Radeon HD 3870 X2 in The Witcher 3: Wild Hunt is 40% more, than GeForce 840A. | ||
low / 768p | 70−75 | 85−90 |
medium / 768p | 35−40 | 45−50 |
ultra / 1080p | 16−18 | 18−20 |
high / 768p | 30−35 | 35−40 |
The average gaming FPS of Mobility Radeon HD 3870 X2 in World of Tanks is 20% more, than GeForce 840A. |
Full Specs
GeForce 840A | Mobility Radeon HD 3870 X2 | |
Architecture | Maxwell | RV6xx |
Code name | GM108 | M88-XT CF |
Type | Desktop | Laptop |
Release date | 17 March 2014 | 1 September 2008 |
Pipelines | 384 | 640 |
Core clock speed | 1029 MHz | 660 MHz |
Boost Clock | 1124 MHz | |
Transistor count | 666 million | |
Manufacturing process technology | 28 nm | 55 nm |
Texture fill rate | 17.98 | 10.56 |
Floating-point performance | 863.2 gflops | 2x 422.4 gflops |
Memory bus width | 64 Bit | 256 Bit |
Memory clock speed | 2002 MHz | 850 MHz |
Memory bandwidth | 16.02 GB/s | 54.4 GB/s |
Shared memory | - | |
DirectX | 12 (11_0) | 10.1 (10_1) |
Shader Model | 5.1 | 4.1 |
OpenGL | 4.6 | 3.3 |
OpenCL | 1.2 | N/A |
Vulkan | 1.1.126 | N/A |
CUDA | 5.0 | |
Laptop size | large | |
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