GeForce GTX 660M vs Radeon R7 M270DX

If you are going to buy a new graphics card and are choosing between GeForce GTX 660M and Radeon R7 M270DX, there are a couple of things to consider. Cards with more VRAM in general perform better and allow you to play on higher graphics settings. Size also makes a difference. A model with a large heatsink can occupy up to three expansion slots on a motherboard. Be sure you have enough room in your PC case. When comparing GPUs with different architectures, more processing cores and even higher TFLOPS will not always translate to better performance. To help you decide which GPU you need, we have measured frame rates in a number of popular games. For more on how the GeForce GTX 660M stacks up against Radeon R7 M270DX, check out specs charts below.

GeForce GTX 660M is a Laptop Graphics Card

Note: GeForce GTX 660M 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 GTX 660M here:

Main Specs

  GeForce GTX 660M Radeon R7 M270DX
Power consumption (TDP) 50 Watt
Interface MXM-B (3.0) IGP
Memory type GDDR5 System Shared
Maximum RAM amount 2 GB
Display Connectors No outputs No outputs
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  • GeForce GTX 660M is connected by MXM-B (3.0), and Radeon R7 M270DX uses IGP interface.
  • GeForce GTX 660M is used in Laptops, and Radeon R7 M270DX - in Desktops.
  • GeForce GTX 660M is build with Kepler architecture, and Radeon R7 M270DX - with GCN 3.0.
  • Core clock speed of Radeon R7 M270DX is 65 MHz higher, than GeForce GTX 660M.
  • GeForce GTX 660M and Radeon R7 M270DX are manufactured by 28 nm process technology.

Game benchmarks

high / 1080p 6−7 2−3
ultra / 1080p 4−5 0−1
QHD / 1440p 0−1 0−1
low / 720p 16−18 12−14
medium / 1080p 8−9 3−4
The average gaming FPS of GeForce GTX 660M in Assassin's Creed Odyssey is 66% more, than Radeon R7 M270DX.

Full Specs

  GeForce GTX 660M Radeon R7 M270DX
Architecture Kepler GCN 3.0
Code name N13E-GE Topaz
Type Laptop Desktop
Release date 22 March 2012 11 June 2014
Pipelines 384 384
Core clock speed 835 MHz 900 MHz
Boost Clock 950 MHz 940 MHz
Transistor count 1,270 million 1,550 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 30.4 billion/sec 22.56
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 12 (12_0)
Shader Model 5.1 6.3
OpenGL 4.5 4.6
OpenCL 1.1 2.0
Vulkan 1.1.126 1.2.131
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
Optimus +
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