GeForce GT 640M vs Radeon R9 M270X

In this comparison between GeForce GT 640M and Radeon R9 M270X 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 R9 M270X will be their preference. Study the comparison tables below and make your choice.

GeForce GT 640M is a Laptop Graphics Card

Note: GeForce GT 640M 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 here:

Main Specs

  GeForce GT 640M Radeon R9 M270X
Power consumption (TDP) 32 Watt
Interface PCIe 3.0 x16 PCIe 3.0 x16
Memory type DDR3\GDDR5 GDDR5
Maximum RAM amount 2 GB 4 GB
Display Connectors No outputs No outputs
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  • Both video cards are using PCIe 3.0 x16 interface connection to a motherboard.
  • Radeon R9 M270X has 2 GB more memory, than GeForce GT 640M.
  • GeForce GT 640M is used in Laptops, and Radeon R9 M270X - in Desktops.
  • GeForce GT 640M is build with Kepler architecture, and Radeon R9 M270X - with GCN 1.0.
  • GeForce GT 640M and Radeon R9 M270X are manufactured by 28 nm process technology.
  • Memory clock speed of GeForce GT 640M is 675 MHz higher, than Radeon R9 M270X.

Game benchmarks

high / 1080p 0−1 6−7
ultra / 1080p 0−1 4−5
QHD / 1440p 0−1 0−1
low / 720p 10−12 16−18
medium / 1080p 2−3 8−9
The average gaming FPS of Radeon R9 M270X in Assassin's Creed Odyssey is 100% more, than GeForce GT 640M.

Full Specs

  GeForce GT 640M Radeon R9 M270X
Architecture Kepler GCN 1.0
Code name N13P-GS Venus
Type Laptop Desktop
Release date 22 March 2012 21 March 2014
Pipelines 384 640
Core clock speed 725 MHz
Boost Clock 645 MHz 775 MHz
Transistor count 1,270 million 1,500 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 31.00
Floating-point performance 480.0 gflops 1,536 gflops
Memory bus width 128bit 128 Bit
Memory clock speed 1800 - 4000 MHz 1125 MHz
Memory bandwidth 72 GB/s
Shared memory -
DirectX 12 API
Shader Model 5.1 5.1
OpenGL 4.5 4.4
OpenCL 1.1 Not Listed
Vulkan 1.1.126
CUDA +
FreeSync +
CUDA cores 384
Bus support PCI Express 2.0, PCI Express 3.0 PCIe 3.0 x16
HDMI +
HDCP +
Maximum VGA resolution Up to 2048x1536
3D Blu-Ray +
Bitcoin / BTC (SHA256) 18 Mh/s
Laptop size medium sized
Optimus +
Eyefinity +
HD3D +
PowerTune +
DualGraphics +
ZeroCore +
Switchable graphics +
Mantle +
Compute units 10
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