GeForce GTX 660M vs Mobility Radeon HD 5870 Crossfire

If you are going to buy a new graphics card and are choosing between GeForce GTX 660M and Mobility Radeon HD 5870 Crossfire, 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 Mobility Radeon HD 5870 Crossfire, check out specs charts below.

GeForce GTX 660M and Mobility Radeon HD 5870 Crossfire are Laptop Graphics Cards

Note: GeForce GTX 660M and Mobility Radeon HD 5870 Crossfire 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 Mobility Radeon HD 5870 Crossfire here:

Main Specs

  GeForce GTX 660M Mobility Radeon HD 5870 Crossfire
Power consumption (TDP) 50 Watt 120 Watt
Interface MXM-B (3.0)
Memory type GDDR5 DDR3, GDDR3, GDDR5
Maximum RAM amount 2 GB 2x1 GB
Display Connectors No outputs
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  • Mobility Radeon HD 5870 Crossfire has 140% more power consumption, than GeForce GTX 660M.
  • GeForce GTX 660M and Mobility Radeon HD 5870 Crossfire have maximum RAM of 2 GB.
  • Both cards are used in Laptops.
  • GeForce GTX 660M is build with Kepler architecture, and Mobility Radeon HD 5870 Crossfire - with Terascale 2.
  • Core clock speed of GeForce GTX 660M is 135 MHz higher, than Mobility Radeon HD 5870 Crossfire.
  • GeForce GTX 660M is manufactured by 28 nm process technology, and Mobility Radeon HD 5870 Crossfire - by 40 nm process technology.
  • Memory clock speed of GeForce GTX 660M is 1000 MHz higher, than Mobility Radeon HD 5870 Crossfire.

Game benchmarks

high / 1080p 6−7 16−18
ultra / 1080p 4−5 9−10
QHD / 1440p 0−1 4−5
low / 720p 16−18 30−35
medium / 1080p 8−9 18−20
The average gaming FPS of Mobility Radeon HD 5870 Crossfire in Assassin's Creed Odyssey is 111% more, than GeForce GTX 660M.

Full Specs

  GeForce GTX 660M Mobility Radeon HD 5870 Crossfire
Architecture Kepler Terascale 2
Code name N13E-GE Broadway-XT
Type Laptop Laptop
Release date 22 March 2012 7 January 2010
Pipelines 384 1600
Core clock speed 835 MHz 700 MHz
Boost Clock 950 MHz
Transistor count 1,270 million
Manufacturing process technology 28 nm 40 nm
Texture fill rate 30.4 billion/sec
Floating-point performance 729.6 gflops
Memory bus width 128bit 128 Bit
Memory clock speed 2000 MHz 1000 MHz
Memory bandwidth 64.0 GB/s
Shared memory - -
DirectX 12 API DirectX 11, 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 large
Optimus +
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