GeForce GT 640M vs Radeon Pro 455

Find out if it is worth upgrading your current GPU setup by comparing GeForce GT 640M and Radeon Pro 455. Here you can take a closer look at graphics cards specs, such as core clock speed, memory type and size, display connectors, etc. The price, overall benchmark and gaming performances are usually defining factors when it comes to choosing between GeForce GT 640M and Radeon Pro 455. Make sure that the graphics card has compatible dimensions and will properly fit in your new or current computer case. Also these graphics cards may have different system power recommendations, so take that into consideration and upgrade your PSU if necessary.

GeForce GT 640M and Radeon Pro 455 are Laptop Graphics Cards

Note: GeForce GT 640M and Radeon Pro 455 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 455 here:

Main Specs

  GeForce GT 640M Radeon Pro 455
Power consumption (TDP) 32 Watt 35 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 455 has 9% more power consumption, than GeForce GT 640M.
  • GeForce GT 640M is connected by PCIe 3.0 x16, and Radeon Pro 455 uses PCIe 3.0 x8 interface.
  • GeForce GT 640M and Radeon Pro 455 have maximum RAM of 2 GB.
  • GeForce GT 640M is used in Laptops, and Radeon Pro 455 - in Mobile workstations.
  • GeForce GT 640M is build with Kepler architecture, and Radeon Pro 455 - with Polaris.
  • GeForce GT 640M is manufactured by 28 nm process technology, and Radeon Pro 455 - by 14 nm process technology.
  • Memory clock speed of Radeon Pro 455 is 3200 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 455 in Assassin's Creed Odyssey is 333% more, than GeForce GT 640M.

Full Specs

  GeForce GT 640M Radeon Pro 455
Architecture Kepler Polaris
Code name N13P-GS Polaris 11
Type Laptop Mobile workstation
Release date 22 March 2012 27 October 2016
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 41.04
Floating-point performance 480.0 gflops 1,313 gflops
Memory bus width 128bit 128 Bit
Memory clock speed 1800 - 4000 MHz 5000 MHz
Memory bandwidth 81.28 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 163 Mh/s
Laptop size medium sized large
Optimus +
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