GeForce GT 640M LE vs Radeon HD 7970

If you are going to buy a new graphics card and are choosing between GeForce GT 640M LE and Radeon HD 7970, 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 LE stacks up against Radeon HD 7970, check out specs charts below.

GeForce GT 640M LE is a Laptop Graphics Card

Note: GeForce GT 640M LE 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 LE here:

Main Specs

  GeForce GT 640M LE Radeon HD 7970
Power consumption (TDP) 20 Watt 300 Watt
Interface PCIe 2.0 x16 PCIe 3.0 x16
Supplementary power connectors 1x 6-pin + 1x 8-pin
Memory type DDR3\DDR5 GDDR5
Maximum RAM amount 2 GB 3 GB
Display Connectors No outputs 1x DVI, 1x HDMI, 2x mini-DisplayPort
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  • Radeon HD 7970 has 1400% more power consumption, than GeForce GT 640M LE.
  • GeForce GT 640M LE is connected by PCIe 2.0 x16, and Radeon HD 7970 uses PCIe 3.0 x16 interface.
  • Radeon HD 7970 has 1 GB more memory, than GeForce GT 640M LE.
  • GeForce GT 640M LE is used in Laptops, and Radeon HD 7970 - in Desktops.
  • GeForce GT 640M LE is build with Fermi / Kepler architecture, and Radeon HD 7970 - with GCN.
  • GeForce GT 640M LE and Radeon HD 7970 are manufactured by 28 nm process technology.
  • Memory clock speed of GeForce GT 640M LE is 425 MHz higher, than Radeon HD 7970.

Game benchmarks

high / 1080p 0−1 35−40
ultra / 1080p 21−24
QHD / 1440p 0−1 16−18
4K / 2160p 10−11
low / 720p 1−2 60−65
medium / 1080p 0−1 40−45
The average gaming FPS of Radeon HD 7970 in Assassin's Creed Odyssey is 6100% more, than GeForce GT 640M LE.

Full Specs

  GeForce GT 640M LE Radeon HD 7970
Architecture Fermi / Kepler GCN
Code name N13P-LP Tahiti XT
Type Laptop Desktop
Release date 22 March 2012 22 December 2011
Pipelines 384 2048
Boost Clock 925 MHz
Transistor count 585 million 4,313 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 118.4
Floating-point performance 384.0 gflops 3,789 gflops
Length 274 mm
Memory bus width 128bit 384 Bit
Memory clock speed 1800 - 4000 MHz 1375 MHz
Memory bandwidth 264 GB/s
Shared memory - -
DirectX 12 API
Shader Model 5.1 5.1
OpenGL 4.5 4.6
OpenCL 1.1 1.2
Vulkan N/A
CUDA +
FreeSync +
CUDA cores Up to 384
Bus support PCI Express 2.0, PCI Express 3.0 PCIe 2.1 x16
HDMI + +
HDCP +
Maximum VGA resolution Up to 2048x1536
3D Blu-Ray +
Bitcoin / BTC (SHA256) 14 Mh/s 485 Mh/s
Laptop size medium sized
Optimus +
Eyefinity +
Design reference
CrossFire +
Ethereum / ETH (DaggerHashimoto) 20.71 Mh/s
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