GeForce GT 640M vs GeForce GTX 850A
If you are going to buy a new graphics card and are choosing between GeForce GT 640M and GeForce GTX 850A, 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 GT 640M stacks up against GeForce GTX 850A, check out specs charts below.
GeForce GTX 850A
GeForce GT 640M is a Laptop Graphics Card
Note: GeForce GT 640M 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 GeForce GT 640M here:
Main Specs
| GeForce GT 640M | GeForce GTX 850A | |
| Power consumption (TDP) | 32 Watt | 45 Watt |
| Interface | PCIe 3.0 x16 | PCIe 3.0 x16 |
| Memory type | DDR3\GDDR5 | DDR3 |
| Maximum RAM amount | 2 GB | 2 GB |
| Display Connectors | No outputs | No outputs |
| Check Price |
- GeForce GTX 850A has 40% more power consumption, than GeForce GT 640M.
- Both video cards are using PCIe 3.0 x16 interface connection to a motherboard.
- GeForce GT 640M and GeForce GTX 850A have maximum RAM of 2 GB.
- GeForce GT 640M is used in Laptops, and GeForce GTX 850A - in Desktops.
- GeForce GT 640M is build with Kepler architecture, and GeForce GTX 850A - with Maxwell.
- GeForce GT 640M and GeForce GTX 850A are manufactured by 28 nm process technology.
- Memory clock speed of GeForce GT 640M and GeForce GTX 850A is 1800 MHz.
Game benchmarks
| high / 1080p | 0−1 | 1−2 |
| ultra / 1080p | 0−1 | 0−1 |
| QHD / 1440p | 0−1 | 0−1 |
| low / 720p | 10−12 | 12−14 |
| medium / 1080p | 2−3 | 3−4 |
| The average gaming FPS of GeForce GTX 850A in Assassin's Creed Odyssey is 33% more, than GeForce GT 640M. | ||
| ultra / 1080p | 3−4 | 4−5 |
| QHD / 1440p | 0−1 | 0−1 |
| low / 720p | 12−14 | 16−18 |
| medium / 1080p | 4−5 | 5−6 |
| The average gaming FPS of GeForce GTX 850A in Battlefield 5 is 28% more, than GeForce GT 640M. | ||
| low / 768p | 50−55 | 45−50 |
| high / 1080p | 45−50 | 40−45 |
| QHD / 1440p | 0−1 | 0−1 |
| The average gaming FPS of GeForce GT 640M in Call of Duty: Warzone is 11% more, than GeForce GTX 850A. | ||
| low / 768p | 110−120 | 120−130 |
| medium / 768p | 85−90 | 90−95 |
| ultra / 1080p | 35−40 | 40−45 |
| QHD / 1440p | − | 24−27 |
| 4K / 2160p | 10−11 | 18−20 |
| high / 768p | 55−60 | 65−70 |
| The average gaming FPS of GeForce GTX 850A in Counter-Strike: Global Offensive is 13% more, than GeForce GT 640M. | ||
| low / 768p | 70−75 | 85−90 |
| ultra / 1080p | 12−14 | 16−18 |
| medium / 1080p | 45−50 | 40−45 |
| The average gaming FPS of GeForce GTX 850A in Cyberpunk 2077 is 11% more, than GeForce GT 640M. | ||
| low / 768p | 70−75 | 75−80 |
| medium / 768p | 40−45 | 50−55 |
| ultra / 1080p | 18−20 | 24−27 |
| The average gaming FPS of GeForce GTX 850A in Dota 2 is 15% more, than GeForce GT 640M. | ||
| high / 1080p | 2−3 | 2−3 |
| ultra / 1080p | 2−3 | 2−3 |
| 4K / 2160p | 0−1 | 0−1 |
| low / 720p | 9−10 | 12−14 |
| medium / 1080p | 3−4 | 3−4 |
| The average gaming FPS of GeForce GTX 850A in Far Cry 5 is 25% more, than GeForce GT 640M. | ||
| high / 1080p | − | 10−11 |
| ultra / 1080p | 5−6 | 5−6 |
| QHD / 1440p | 1−2 | 2−3 |
| low / 720p | 45−50 | 50−55 |
| medium / 1080p | 7−8 | 10−12 |
| The average gaming FPS of GeForce GTX 850A in Fortnite is 13% more, than GeForce GT 640M. | ||
| high / 1080p | 2−3 | 4−5 |
| QHD / 1440p | 0−1 | 0−1 |
| low / 720p | 14−16 | 16−18 |
| medium / 1080p | 5−6 | 7−8 |
| The average gaming FPS of GeForce GTX 850A in Forza Horizon 4 is 28% more, than GeForce GT 640M. | ||
| low / 768p | 40−45 | 45−50 |
| high / 1080p | 3−4 | 5−6 |
| ultra / 1080p | 2−3 | 2−3 |
| QHD / 1440p | 0−1 | 0−1 |
| medium / 720p | 30−35 | 35−40 |
| The average gaming FPS of GeForce GTX 850A in Grand Theft Auto V is 15% more, than GeForce GT 640M. | ||
| high / 1080p | 1−2 | 1−2 |
| ultra / 1080p | 0−1 | 0−1 |
| 4K / 2160p | 0−1 | 0−1 |
| low / 720p | 2−3 | 5−6 |
| medium / 1080p | 2−3 | 3−4 |
| The average gaming FPS of GeForce GTX 850A in Metro Exodus is 50% more, than GeForce GT 640M. | ||
| low / 768p | 85−90 | 90−95 |
| high / 1080p | 55−60 | 85−90 |
| ultra / 1080p | − | 70−75 |
| medium / 1080p | − | 90−95 |
| The average gaming FPS of GeForce GTX 850A in Minecraft is 25% more, than GeForce GT 640M. | ||
| high / 1080p | 14−16 | − |
| ultra / 1080p | 12−14 | 12−14 |
| low / 720p | 24−27 | 27−30 |
| medium / 1080p | 14−16 | 14−16 |
| The average gaming FPS of GeForce GTX 850A in PLAYERUNKNOWN'S BATTLEGROUNDS is 5% more, than GeForce GT 640M. | ||
| ultra / 1080p | 3−4 | 4−5 |
| QHD / 1440p | 0−1 | 0−1 |
| low / 720p | 3−4 | 6−7 |
| The average gaming FPS of GeForce GTX 850A in Red Dead Redemption 2 is 66% more, than GeForce GT 640M. | ||
| low / 768p | 7−8 | 12−14 |
| medium / 768p | 6−7 | 9−10 |
| high / 1080p | 3−4 | 4−5 |
| ultra / 1080p | − | 3−4 |
| 4K / 2160p | 0−1 | 0−1 |
| The average gaming FPS of GeForce GTX 850A in The Witcher 3: Wild Hunt is 80% more, than GeForce GT 640M. | ||
| low / 768p | 70−75 | 75−80 |
| medium / 768p | 35−40 | 35−40 |
| ultra / 1080p | 12−14 | 16−18 |
| high / 768p | 27−30 | 30−35 |
| The average gaming FPS of GeForce GTX 850A in World of Tanks is 10% more, than GeForce GT 640M. | ||
Full Specs
| GeForce GT 640M | GeForce GTX 850A | |
| Architecture | Kepler | Maxwell |
| Code name | N13P-GS | GM107 |
| Type | Laptop | Desktop |
| Release date | 22 March 2012 | 17 March 2014 |
| Pipelines | 384 | 640 |
| Core clock speed | 902 MHz | |
| Boost Clock | 645 MHz | 936 MHz |
| Transistor count | 1,270 million | 1,870 million |
| Manufacturing process technology | 28 nm | 28 nm |
| Texture fill rate | 37.44 | |
| Floating-point performance | 480.0 gflops | 1,198 gflops |
| Memory bus width | 128bit | 128 Bit |
| Memory clock speed | 1800 - 4000 MHz | 1800 MHz |
| Memory bandwidth | 28.8 GB/s | |
| Shared memory | - | |
| DirectX | 12 API | 12 (11_0) |
| Shader Model | 5.1 | 5.1 |
| OpenGL | 4.5 | 4.6 |
| OpenCL | 1.1 | 1.2 |
| Vulkan | 1.1.126 | 1.1.126 |
| CUDA | + | 5.0 |
| CUDA cores | 384 | |
| Bus support | PCI Express 2.0, PCI Express 3.0 | |
| HDMI | + | |
| HDCP | + | |
| Maximum VGA resolution | Up to 2048x1536 | |
| 3D Blu-Ray | + | |
| Bitcoin / BTC (SHA256) | 18 Mh/s | |
| Laptop size | medium sized | |
| Optimus | + | |
| Check Price |