GeForce GTX 675MX vs Radeon RX 640

When choosing between GeForce GTX 675MX and Radeon RX 640, it is worth examining the specifications of the models in detail. Do they meet the recommended requirements of modern games and software? Storage capacity, form factor, TDP, available ports, warranty and manufacturer support are all important. For example, the size of a PC case can limit the maximum thickness and length of the card. Often, instead of the factory overclocked card and RGB backlight, it is better to choose a reference model with a more efficient GPU. And make sure that your current power supply unit has the correct connection pins (using adapters is not recommended). This GPUs compare tool is meant to help you to choose the best graphics card for your build. Let's find out the difference between GeForce GTX 675MX and Radeon RX 640.

GeForce GTX 675MX and Radeon RX 640 are Laptop Graphics Cards

Note: GeForce GTX 675MX and Radeon RX 640 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 GTX 675MX or Radeon RX 640 here:

Main Specs

  GeForce GTX 675MX Radeon RX 640
Power consumption (TDP) 100 Watt 50 Watt
Interface MXM-B (3.0) PCIe 3.0 x8
Supplementary power connectors None None
Memory type GDDR5 GDDR5
Maximum RAM amount 2 GB 4 GB
Display Connectors No outputs 1x DVI, 1x HDMI, 1x DisplayPort
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  • GeForce GTX 675MX has 100% more power consumption, than Radeon RX 640.
  • GeForce GTX 675MX is connected by MXM-B (3.0), and Radeon RX 640 uses PCIe 3.0 x8 interface.
  • Radeon RX 640 has 2 GB more memory, than GeForce GTX 675MX.
  • Both cards are used in Laptops.
  • GeForce GTX 675MX is build with Kepler architecture, and Radeon RX 640 - with Polaris.
  • Core clock speed of Radeon RX 640 is 618 MHz higher, than GeForce GTX 675MX.
  • GeForce GTX 675MX is manufactured by 28 nm process technology, and Radeon RX 640 - by 14 nm process technology.
  • Memory clock speed of Radeon RX 640 is 4200 MHz higher, than GeForce GTX 675MX.

Game benchmarks

high / 1080p 9−10 5−6
ultra / 1080p 5−6 3−4
QHD / 1440p 0−1 2−3
low / 720p 21−24 16−18
medium / 1080p 12−14 7−8
The average gaming FPS of GeForce GTX 675MX in Assassin's Creed Odyssey is 50% more, than Radeon RX 640.

Full Specs

  GeForce GTX 675MX Radeon RX 640
Architecture Kepler Polaris
Code name N13E-GSR Polaris 12
Type Laptop Laptop
Release date 1 October 2012 12 August 2019
Pipelines 960 640
Core clock speed 600 MHz 1218 MHz
Boost Clock 1218 MHz
Transistor count 3,540 million 2,200 million
Manufacturing process technology 28 nm 14 nm
Texture fill rate 48.0 billion/sec 38.98
Floating-point performance 1,256 gflops
Memory bus width 256 Bit 64 Bit
Memory clock speed 1800 MHz 6000 MHz
Memory bandwidth 115.2 GB/s 112.0 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 960
Bus support PCI Express 2.0
SLI options +
HDMI +
HDCP +
Maximum VGA resolution Up to 2048x1536
Bitcoin / BTC (SHA256) 63 Mh/s
Laptop size large large
Optimus +
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