GeForce GT 640M vs Radeon Pro 555

In this comparison between GeForce GT 640M and Radeon Pro 555 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 GT 640M will be the best choice, for others Radeon Pro 555 will be their preference. Study the comparison tables below and make your choice.

GeForce GT 640M and Radeon Pro 555 are Laptop Graphics Cards

Note: GeForce GT 640M and Radeon Pro 555 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 or Radeon Pro 555 here:

Main Specs

  GeForce GT 640M Radeon Pro 555
Power consumption (TDP) 32 Watt 75 Watt
Interface PCIe 3.0 x16 PCIe 3.0 x8
Supplementary power connectors None
Memory type DDR3\GDDR5 GDDR5
Maximum RAM amount 2 GB 2 GB
Display Connectors No outputs No outputs
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  • Radeon Pro 555 has 134% more power consumption, than GeForce GT 640M.
  • GeForce GT 640M is connected by PCIe 3.0 x16, and Radeon Pro 555 uses PCIe 3.0 x8 interface.
  • GeForce GT 640M and Radeon Pro 555 have maximum RAM of 2 GB.
  • GeForce GT 640M is used in Laptops, and Radeon Pro 555 - in Mobile workstations.
  • GeForce GT 640M is build with Kepler architecture, and Radeon Pro 555 - with Polaris.
  • GeForce GT 640M is manufactured by 28 nm process technology, and Radeon Pro 555 - by 14 nm process technology.
  • Memory clock speed of Radeon Pro 555 is 3280 MHz higher, than GeForce GT 640M.

Game benchmarks

high / 1080p 0−1 16−18
ultra / 1080p 0−1 9−10
QHD / 1440p 0−1 4−5
4K / 2160p 4−5
low / 720p 10−12 30−35
medium / 1080p 2−3 20−22
The average gaming FPS of Radeon Pro 555 in Assassin's Creed Odyssey is 333% more, than GeForce GT 640M.

Full Specs

  GeForce GT 640M Radeon Pro 555
Architecture Kepler Polaris
Code name N13P-GS Polaris 21
Type Laptop Mobile workstation
Release date 22 March 2012 5 June 2017
Pipelines 384 768
Core clock speed 855 MHz
Boost Clock 645 MHz
Transistor count 1,270 million 3,000 million
Manufacturing process technology 28 nm 14 nm
Texture fill rate 40.80
Floating-point performance 480.0 gflops 1,306 gflops
Memory bus width 128bit 128 Bit
Memory clock speed 1800 - 4000 MHz 5080 MHz
Memory bandwidth 81.6 GB/s
Shared memory - -
DirectX 12 API 12 (12_0)
Shader Model 5.1 6.4
OpenGL 4.5 4.6
OpenCL 1.1 2.0
Vulkan 1.1.126 1.2.131
CUDA +
FreeSync +
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
Laptop size medium sized large
Optimus +
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