GeForce GT 640M LE vs Radeon HD 8790M

When comparing GeForce GT 640M LE and Radeon HD 8790M, we look primarily at benchmarks and game tests. But it is not only about the numbers. Often you can find third-party models with higher clock speeds, better cooling, or a customizable RGB lighting. Not all of them will have all the features you need. Another thing to consider is the port selection. Most graphics cards have at least one DisplayPort and HDMI interface, but some monitors require DVI. Before you buy, check the TDP of the graphics card - this characteristic will help you estimate the consumption of the graphics card. You may even have to upgrade your PSU to meet its requirements. An important factor when choosing between GeForce GT 640M LE and Radeon HD 8790M is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.

GeForce GT 640M LE and Radeon HD 8790M are Laptop Graphics Cards

Note: GeForce GT 640M LE and Radeon HD 8790M 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 8790M here:

Main Specs

  GeForce GT 640M LE Radeon HD 8790M
Power consumption (TDP) 20 Watt
Interface PCIe 2.0 x16 MXM-A (3.0)
Supplementary power connectors None
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 8790M uses MXM-A (3.0) interface.
  • GeForce GT 640M LE and Radeon HD 8790M 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 8790M - with GCN.
  • GeForce GT 640M LE and Radeon HD 8790M are manufactured by 28 nm process technology.
  • Memory clock speed of Radeon HD 8790M is 2700 MHz higher, than GeForce GT 640M LE.

Game benchmarks

high / 1080p 0−1 3−4
ultra / 1080p 1−2
QHD / 1440p 0−1 0−1
low / 720p 1−2 14−16
medium / 1080p 0−1 6−7
The average gaming FPS of Radeon HD 8790M in Assassin's Creed Odyssey is 1400% more, than GeForce GT 640M LE.

Full Specs

  GeForce GT 640M LE Radeon HD 8790M
Architecture Fermi / Kepler GCN
Code name N13P-LP Mars XTX
Type Laptop Laptop
Release date 22 March 2012 16 November 2012
Pipelines 384 384
Core clock speed 850 MHz
Boost Clock 900 MHz
Transistor count 585 million 950 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 21.60
Floating-point performance 384.0 gflops 691.2 gflops
Memory bus width 128bit 128 Bit
Memory clock speed 1800 - 4000 MHz 4500 MHz
Memory bandwidth 64 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 80 Mh/s
Laptop size medium sized medium sized
Optimus +
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