GeForce 945A vs GeForce GT 640M
In this comparison between GeForce 945A and GeForce GT 640M you will find out which graphics card performs better in today's games. Bear in mind that third-party versions may have more efficient cooling and higher clock speeds. This will increase cards' performance, though not by much. In addition to raw power you should also take into account the dimensions. Thicker models simply will not fit into a small mini-ITX case. The resolution of your monitor also affects the choice, since 4K gameplay requires a more powerful GPU. And don't overspend on the graphics card. Other parts of your build may also need to be upgraded, save some money for the CPU or power supply. For some people GeForce 945A will be the best choice, for others GeForce GT 640M will be their preference. Study the comparison tables below and make your choice.
GeForce 945A
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 945A | GeForce GT 640M | |
| Power consumption (TDP) | 33 Watt | 32 Watt |
| Interface | PCIe 3.0 x8 | PCIe 3.0 x16 |
| Memory type | GDDR5 | DDR3\GDDR5 |
| Maximum RAM amount | 1 GB | 2 GB |
| Display Connectors | No outputs | No outputs |
| Check Price |
- GeForce 945A has 3% more power consumption, than GeForce GT 640M.
- GeForce 945A is connected by PCIe 3.0 x8, and GeForce GT 640M uses PCIe 3.0 x16 interface.
- GeForce GT 640M has 1 GB more memory, than GeForce 945A.
- GeForce 945A is used in Desktops, and GeForce GT 640M - in Laptops.
- GeForce 945A is build with Maxwell architecture, and GeForce GT 640M - with Kepler.
- GeForce 945A and GeForce GT 640M are manufactured by 28 nm process technology.
- Memory clock speed of GeForce 945A is 3212 MHz higher, than GeForce GT 640M.
Game benchmarks
| high / 1080p | 9−10 | 0−1 |
| ultra / 1080p | 5−6 | 0−1 |
| QHD / 1440p | 0−1 | 0−1 |
| low / 720p | 20−22 | 10−12 |
| medium / 1080p | 10−12 | 2−3 |
| The average gaming FPS of GeForce 945A in Assassin's Creed Odyssey is 166% more, than GeForce GT 640M. | ||
| high / 1080p | 14−16 | − |
| ultra / 1080p | 12−14 | 3−4 |
| QHD / 1440p | 0−1 | 0−1 |
| low / 720p | 30−35 | 12−14 |
| medium / 1080p | 16−18 | 4−5 |
| The average gaming FPS of GeForce 945A in Battlefield 5 is 185% more, than GeForce GT 640M. | ||
| low / 768p | 45−50 | 50−55 |
| high / 1080p | 45−50 | 45−50 |
| QHD / 1440p | 0−1 | 0−1 |
| The average gaming FPS of GeForce GT 640M in Call of Duty: Warzone is 6% more, than GeForce 945A. | ||
| low / 768p | 160−170 | 110−120 |
| medium / 768p | 130−140 | 85−90 |
| ultra / 1080p | 65−70 | 35−40 |
| QHD / 1440p | 35−40 | − |
| 4K / 2160p | 27−30 | 10−11 |
| high / 768p | 95−100 | 55−60 |
| The average gaming FPS of GeForce 945A in Counter-Strike: Global Offensive is 60% more, than GeForce GT 640M. | ||
| low / 768p | 55−60 | 70−75 |
| ultra / 1080p | 24−27 | 12−14 |
| medium / 1080p | 45−50 | 45−50 |
| The average gaming FPS of GeForce GT 640M in Cyberpunk 2077 is 2% more, than GeForce 945A. | ||
| low / 768p | 90−95 | 70−75 |
| medium / 768p | 70−75 | 40−45 |
| ultra / 1080p | 40−45 | 18−20 |
| The average gaming FPS of GeForce 945A in Dota 2 is 56% more, than GeForce GT 640M. | ||
| high / 1080p | 10−11 | 2−3 |
| ultra / 1080p | 10−11 | 2−3 |
| 4K / 2160p | 4−5 | 0−1 |
| low / 720p | 24−27 | 9−10 |
| medium / 1080p | 10−12 | 3−4 |
| The average gaming FPS of GeForce 945A in Far Cry 5 is 250% more, than GeForce GT 640M. | ||
| high / 1080p | 16−18 | − |
| ultra / 1080p | 12−14 | 5−6 |
| QHD / 1440p | − | 1−2 |
| low / 720p | 70−75 | 45−50 |
| medium / 1080p | 30−35 | 7−8 |
| The average gaming FPS of GeForce 945A in Fortnite is 95% more, than GeForce GT 640M. | ||
| high / 1080p | 14−16 | 2−3 |
| ultra / 1080p | 12−14 | − |
| QHD / 1440p | 3−4 | 0−1 |
| low / 720p | 30−35 | 14−16 |
| medium / 1080p | 18−20 | 5−6 |
| The average gaming FPS of GeForce 945A in Forza Horizon 4 is 214% more, than GeForce GT 640M. | ||
| low / 768p | 60−65 | 40−45 |
| medium / 768p | 50−55 | − |
| high / 1080p | 16−18 | 3−4 |
| ultra / 1080p | 8−9 | 2−3 |
| QHD / 1440p | 0−1 | 0−1 |
| medium / 720p | − | 30−35 |
| The average gaming FPS of GeForce 945A in Grand Theft Auto V is 81% more, than GeForce GT 640M. | ||
| high / 1080p | 6−7 | 1−2 |
| ultra / 1080p | 4−5 | 0−1 |
| 4K / 2160p | 1−2 | 0−1 |
| low / 720p | 16−18 | 2−3 |
| medium / 1080p | 8−9 | 2−3 |
| The average gaming FPS of GeForce 945A in Metro Exodus is 400% more, than GeForce GT 640M. | ||
| low / 768p | 100−105 | 85−90 |
| high / 1080p | 95−100 | 55−60 |
| ultra / 1080p | 85−90 | − |
| medium / 1080p | 95−100 | − |
| The average gaming FPS of GeForce 945A in Minecraft is 38% more, than GeForce GT 640M. | ||
| high / 1080p | 18−20 | 14−16 |
| ultra / 1080p | 14−16 | 12−14 |
| low / 720p | 35−40 | 24−27 |
| medium / 1080p | 18−20 | 14−16 |
| The average gaming FPS of GeForce 945A in PLAYERUNKNOWN'S BATTLEGROUNDS is 29% more, than GeForce GT 640M. | ||
| high / 1080p | 12−14 | − |
| ultra / 1080p | 8−9 | 3−4 |
| QHD / 1440p | 0−1 | 0−1 |
| low / 720p | 16−18 | 3−4 |
| medium / 1080p | 12−14 | − |
| The average gaming FPS of GeForce 945A in Red Dead Redemption 2 is 300% more, than GeForce GT 640M. | ||
| low / 768p | 30−35 | 7−8 |
| medium / 768p | 21−24 | 6−7 |
| high / 1080p | 10−12 | 3−4 |
| ultra / 1080p | 7−8 | − |
| 4K / 2160p | 6−7 | 0−1 |
| The average gaming FPS of GeForce 945A in The Witcher 3: Wild Hunt is 340% more, than GeForce GT 640M. | ||
| low / 768p | 90−95 | 70−75 |
| medium / 768p | 50−55 | 35−40 |
| ultra / 1080p | 24−27 | 12−14 |
| high / 768p | 40−45 | 27−30 |
| The average gaming FPS of GeForce 945A in World of Tanks is 43% more, than GeForce GT 640M. | ||
Full Specs
| GeForce 945A | GeForce GT 640M | |
| Architecture | Maxwell | Kepler |
| Code name | GM108 | N13P-GS |
| Type | Desktop | Laptop |
| Release date | 13 March 2015 | 22 March 2012 |
| Pipelines | 384 | 384 |
| Core clock speed | 1072 MHz | |
| Boost Clock | 1189 MHz | 645 MHz |
| Transistor count | 1,270 million | |
| Manufacturing process technology | 28 nm | 28 nm |
| Texture fill rate | 28.54 | |
| Floating-point performance | 903.2 gflops | 480.0 gflops |
| Memory bus width | 64 Bit | 128bit |
| Memory clock speed | 5012 MHz | 1800 - 4000 MHz |
| Memory bandwidth | 40.1 GB/s | |
| Shared memory | - | |
| DirectX | 12 (11_0) | 12 API |
| Shader Model | 5.1 | 5.1 |
| OpenGL | 4.6 | 4.5 |
| OpenCL | 1.2 | 1.1 |
| 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) | 108 Mh/s | 18 Mh/s |
| Laptop size | medium sized | |
| Optimus | + | |
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