GeForce GTX 660M vs Radeon R7 M275DX

In this comparison between GeForce GTX 660M and Radeon R7 M275DX 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 GTX 660M will be the best choice, for others Radeon R7 M275DX will be their preference. Study the comparison tables below and make your choice.

GeForce GTX 660M and Radeon R7 M275DX are Laptop Graphics Cards

Note: GeForce GTX 660M and Radeon R7 M275DX 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 660M or Radeon R7 M275DX here:

Main Specs

  GeForce GTX 660M Radeon R7 M275DX
Power consumption (TDP) 50 Watt
Interface MXM-B (3.0)
Memory type GDDR5 DDR3
Maximum RAM amount 2 GB
Display Connectors No outputs
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  • Both cards are used in Laptops.
  • GeForce GTX 660M is build with Kepler architecture, and Radeon R7 M275DX - with GCN.
  • GeForce GTX 660M and Radeon R7 M275DX are manufactured by 28 nm process technology.

Game benchmarks

high / 1080p 6−7 9−10
ultra / 1080p 4−5 5−6
QHD / 1440p 0−1 0−1
low / 720p 16−18 21−24
medium / 1080p 8−9 10−12
The average gaming FPS of Radeon R7 M275DX in Assassin's Creed Odyssey is 33% more, than GeForce GTX 660M.

Full Specs

  GeForce GTX 660M Radeon R7 M275DX
Architecture Kepler GCN
Code name N13E-GE
Type Laptop Laptop
Release date 22 March 2012 4 June 2014
Pipelines 384 896
Core clock speed 835 MHz
Boost Clock 950 MHz
Transistor count 1,270 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 30.4 billion/sec
Floating-point performance 729.6 gflops
Memory bus width 128bit
Memory clock speed 2000 MHz
Memory bandwidth 64.0 GB/s
Shared memory - +
DirectX 12 API DirectX 12, Shader 5.0
Shader Model 5.1
OpenGL 4.5
OpenCL 1.1
Vulkan 1.1.126
CUDA +
CUDA cores 384
Bus support PCI Express 2.0, PCI Express 3.0
SLI options +
HDMI +
HDCP +
Maximum VGA resolution Up to 2048x1536
Bitcoin / BTC (SHA256) 36 Mh/s
Laptop size large medium sized
Optimus +
Eyefinity +
AppAcceleration +
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