GeForce GT 640M vs Radeon HD 7870 XT
If you are going to buy a new graphics card and are choosing between GeForce GT 640M and Radeon HD 7870 XT, 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 Radeon HD 7870 XT, check out specs charts below.
Radeon HD 7870 XT
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 | Radeon HD 7870 XT | |
| Power consumption (TDP) | 32 Watt | 185 Watt |
| Interface | PCIe 3.0 x16 | PCIe 3.0 x16 |
| Supplementary power connectors | 2x 6-pin | |
| Memory type | DDR3\GDDR5 | GDDR5 |
| Maximum RAM amount | 2 GB | 2 GB |
| Display Connectors | No outputs | 1x DVI, 1x HDMI, 2x mini-DisplayPort |
| Check Price |
- Radeon HD 7870 XT has 478% 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 Radeon HD 7870 XT have maximum RAM of 2 GB.
- GeForce GT 640M is used in Laptops, and Radeon HD 7870 XT - in Desktops.
- GeForce GT 640M is build with Kepler architecture, and Radeon HD 7870 XT - with GCN 1.0.
- GeForce GT 640M and Radeon HD 7870 XT are manufactured by 28 nm process technology.
- Memory clock speed of Radeon HD 7870 XT is 4200 MHz higher, than GeForce GT 640M.
Game benchmarks
| high / 1080p | 0−1 | 35−40 |
| ultra / 1080p | 0−1 | 21−24 |
| QHD / 1440p | 0−1 | 16−18 |
| 4K / 2160p | − | 10−11 |
| low / 720p | 10−12 | 60−65 |
| medium / 1080p | 2−3 | 40−45 |
| The average gaming FPS of Radeon HD 7870 XT in Assassin's Creed Odyssey is 766% more, than GeForce GT 640M. | ||
| high / 1080p | − | 55−60 |
| ultra / 1080p | 3−4 | 45−50 |
| QHD / 1440p | 0−1 | 35−40 |
| 4K / 2160p | − | 18−20 |
| low / 720p | 12−14 | 100−110 |
| medium / 1080p | 4−5 | 60−65 |
| The average gaming FPS of Radeon HD 7870 XT in Battlefield 5 is 914% more, than GeForce GT 640M. | ||
| low / 768p | 50−55 | 50−55 |
| high / 1080p | 45−50 | − |
| QHD / 1440p | 0−1 | 0−1 |
| GeForce GT 640M and Radeon HD 7870 XT have the same average FPS in Call of Duty: Warzone. | ||
| low / 768p | 110−120 | 250−260 |
| medium / 768p | 85−90 | 220−230 |
| ultra / 1080p | 35−40 | 180−190 |
| QHD / 1440p | − | 110−120 |
| 4K / 2160p | 10−11 | 70−75 |
| high / 768p | 55−60 | 210−220 |
| The average gaming FPS of Radeon HD 7870 XT in Counter-Strike: Global Offensive is 211% more, than GeForce GT 640M. | ||
| low / 768p | 70−75 | 60−65 |
| ultra / 1080p | 12−14 | − |
| medium / 1080p | 45−50 | 55−60 |
| GeForce GT 640M and Radeon HD 7870 XT have the same average FPS in Cyberpunk 2077. | ||
| low / 768p | 70−75 | 120−130 |
| medium / 768p | 40−45 | 110−120 |
| ultra / 1080p | 18−20 | 100−110 |
| The average gaming FPS of Radeon HD 7870 XT in Dota 2 is 161% more, than GeForce GT 640M. | ||
| high / 1080p | 2−3 | 45−50 |
| ultra / 1080p | 2−3 | 40−45 |
| QHD / 1440p | − | 27−30 |
| 4K / 2160p | 0−1 | 14−16 |
| low / 720p | 9−10 | 80−85 |
| medium / 1080p | 3−4 | 45−50 |
| The average gaming FPS of Radeon HD 7870 XT in Far Cry 5 is 1275% more, than GeForce GT 640M. | ||
| high / 1080p | − | 60−65 |
| ultra / 1080p | 5−6 | 45−50 |
| QHD / 1440p | 1−2 | 27−30 |
| 4K / 2160p | − | 27−30 |
| low / 720p | 45−50 | 180−190 |
| medium / 1080p | 7−8 | 110−120 |
| The average gaming FPS of Radeon HD 7870 XT in Fortnite is 526% more, than GeForce GT 640M. | ||
| high / 1080p | 2−3 | 60−65 |
| ultra / 1080p | − | 45−50 |
| QHD / 1440p | 0−1 | 30−35 |
| 4K / 2160p | − | 24−27 |
| low / 720p | 14−16 | 100−110 |
| medium / 1080p | 5−6 | 65−70 |
| The average gaming FPS of Radeon HD 7870 XT in Forza Horizon 4 is 1014% more, than GeForce GT 640M. | ||
| low / 768p | 40−45 | 140−150 |
| medium / 768p | − | 120−130 |
| high / 1080p | 3−4 | 70−75 |
| ultra / 1080p | 2−3 | 30−35 |
| QHD / 1440p | 0−1 | 21−24 |
| medium / 720p | 30−35 | − |
| The average gaming FPS of Radeon HD 7870 XT in Grand Theft Auto V is 418% more, than GeForce GT 640M. | ||
| high / 1080p | 1−2 | 24−27 |
| ultra / 1080p | 0−1 | 20−22 |
| QHD / 1440p | − | 16−18 |
| 4K / 2160p | 0−1 | 8−9 |
| low / 720p | 2−3 | 65−70 |
| medium / 1080p | 2−3 | 30−35 |
| The average gaming FPS of Radeon HD 7870 XT in Metro Exodus is 1950% more, than GeForce GT 640M. | ||
| low / 768p | 85−90 | 130−140 |
| high / 1080p | 55−60 | − |
| medium / 1080p | − | 120−130 |
| The average gaming FPS of Radeon HD 7870 XT in Minecraft is 55% more, than GeForce GT 640M. | ||
| high / 1080p | 14−16 | − |
| ultra / 1080p | 12−14 | 14−16 |
| low / 720p | 24−27 | 100−110 |
| medium / 1080p | 14−16 | 18−20 |
| The average gaming FPS of Radeon HD 7870 XT in PLAYERUNKNOWN'S BATTLEGROUNDS is 170% more, than GeForce GT 640M. | ||
| high / 1080p | − | 24−27 |
| ultra / 1080p | 3−4 | 16−18 |
| QHD / 1440p | 0−1 | 10−11 |
| 4K / 2160p | − | 7−8 |
| low / 720p | 3−4 | 65−70 |
| medium / 1080p | − | 35−40 |
| The average gaming FPS of Radeon HD 7870 XT in Red Dead Redemption 2 is 1300% more, than GeForce GT 640M. | ||
| low / 768p | 7−8 | 130−140 |
| medium / 768p | 6−7 | 85−90 |
| high / 1080p | 3−4 | 45−50 |
| ultra / 1080p | − | 24−27 |
| 4K / 2160p | 0−1 | 16−18 |
| The average gaming FPS of Radeon HD 7870 XT in The Witcher 3: Wild Hunt is 1700% more, than GeForce GT 640M. | ||
| low / 768p | 70−75 | 90−95 |
| medium / 768p | 35−40 | 60−65 |
| ultra / 1080p | 12−14 | 50−55 |
| high / 768p | 27−30 | 60−65 |
| The average gaming FPS of Radeon HD 7870 XT in World of Tanks is 81% more, than GeForce GT 640M. | ||
Full Specs
| GeForce GT 640M | Radeon HD 7870 XT | |
| Architecture | Kepler | GCN 1.0 |
| Code name | N13P-GS | Tahiti |
| Type | Laptop | Desktop |
| Release date | 22 March 2012 | 19 November 2012 |
| Pipelines | 384 | 1536 |
| Core clock speed | 925 MHz | |
| Boost Clock | 645 MHz | 975 MHz |
| Transistor count | 1,270 million | 4,313 million |
| Manufacturing process technology | 28 nm | 28 nm |
| Texture fill rate | 93.60 | |
| Floating-point performance | 480.0 gflops | 2,995 gflops |
| Length | 267 mm | |
| Memory bus width | 128bit | 256 Bit |
| Memory clock speed | 1800 - 4000 MHz | 6000 MHz |
| Memory bandwidth | 192.0 GB/s | |
| Shared memory | - | |
| DirectX | 12 API | 12 (11_1) |
| Shader Model | 5.1 | 5.1 |
| OpenGL | 4.5 | 4.6 |
| OpenCL | 1.1 | 1.2 |
| Vulkan | 1.1.126 | 1.2.131 |
| CUDA | + | |
| 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 | 346 Mh/s |
| Laptop size | medium sized | |
| Optimus | + | |
| Ethereum / ETH (DaggerHashimoto) | 14.5 Mh/s | |
| Check Price |