GeForce GT 640M LE vs Radeon HD 8770M

If you are going to buy a new graphics card and are choosing between GeForce GT 640M LE and Radeon HD 8770M, 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 8770M, check out specs charts below.

GeForce GT 640M LE and Radeon HD 8770M are Laptop Graphics Cards

Note: GeForce GT 640M LE and Radeon HD 8770M are only used in laptop graphics. They have 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 or Radeon HD 8770M here:

Main Specs

  GeForce GT 640M LE Radeon HD 8770M
Power consumption (TDP) 20 Watt
Interface PCIe 2.0 x16 PCIe 3.0 x8
Memory type DDR3\DDR5 GDDR5
Maximum RAM amount 2 GB 2 GB
Display Connectors No outputs No outputs
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  • GeForce GT 640M LE is connected by PCIe 2.0 x16, and Radeon HD 8770M uses PCIe 3.0 x8 interface.
  • GeForce GT 640M LE and Radeon HD 8770M have maximum RAM of 2 GB.
  • Both cards are used in Laptops.
  • GeForce GT 640M LE is build with Fermi / Kepler architecture, and Radeon HD 8770M - with GCN.
  • GeForce GT 640M LE and Radeon HD 8770M are manufactured by 28 nm process technology.
  • Memory clock speed of Radeon HD 8770M is 2700 MHz higher, than GeForce GT 640M LE.

Game benchmarks

high / 1080p 0−1 7−8
ultra / 1080p 4−5
QHD / 1440p 0−1 0−1
low / 720p 1−2 16−18
medium / 1080p 0−1 8−9
The average gaming FPS of Radeon HD 8770M in Assassin's Creed Odyssey is 1600% more, than GeForce GT 640M LE.

Full Specs

  GeForce GT 640M LE Radeon HD 8770M
Architecture Fermi / Kepler GCN
Code name N13P-LP Mars
Type Laptop Laptop
Release date 22 March 2012 16 November 2012
Pipelines 384 384
Core clock speed 775 MHz
Boost Clock 825 MHz
Transistor count 585 million 950 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 19.80
Floating-point performance 384.0 gflops 633.6 gflops
Memory bus width 128bit 128 Bit
Memory clock speed 1800 - 4000 MHz 4500 MHz
Memory bandwidth 72 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 N/A 1.2.131
CUDA +
CUDA cores Up to 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) 14 Mh/s
Laptop size medium sized medium sized
Optimus +
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