GeForce GTX 580M vs GeForce GTX 660M

When choosing between GeForce GTX 580M and GeForce GTX 660M, 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 580M and GeForce GTX 660M.

GeForce GTX 580M and GeForce GTX 660M are Laptop Graphics Cards

Note: GeForce GTX 580M and GeForce GTX 660M 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 580M or GeForce GTX 660M here:

Main Specs

  GeForce GTX 580M GeForce GTX 660M
Power consumption (TDP) 100 Watt 50 Watt
Interface MXM-B (3.0) MXM-B (3.0)
Supplementary power connectors None
Memory type GDDR5 GDDR5
Maximum RAM amount 2 MB 2 GB
Display Connectors No outputs No outputs
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  • GeForce GTX 580M has 100% more power consumption, than GeForce GTX 660M.
  • Both video cards are using MXM-B (3.0) interface connection to a motherboard.
  • GeForce GTX 580M and GeForce GTX 660M have maximum RAM of 2 GB.
  • Both cards are used in Laptops.
  • GeForce GTX 580M is build with Fermi architecture, and GeForce GTX 660M - with Kepler.
  • Core clock speed of GeForce GTX 660M is 215 MHz higher, than GeForce GTX 580M.
  • GeForce GTX 580M is manufactured by 40 nm process technology, and GeForce GTX 660M - by 28 nm process technology.
  • Memory clock speed of GeForce GTX 660M is 500 MHz higher, than GeForce GTX 580M.

Game benchmarks

high / 1080p 10−12 6−7
ultra / 1080p 6−7 4−5
QHD / 1440p 1−2 0−1
low / 720p 24−27 16−18
medium / 1080p 14−16 8−9
The average gaming FPS of GeForce GTX 580M in Assassin's Creed Odyssey is 55% more, than GeForce GTX 660M.

Full Specs

  GeForce GTX 580M GeForce GTX 660M
Architecture Fermi Kepler
Code name N12E-GTX2 N13E-GE
Type Laptop Laptop
Release date 28 June 2011 22 March 2012
Pipelines 384 384
Core clock speed 620 MHz 835 MHz
Boost Clock 950 MHz
Transistor count 1,950 million 1,270 million
Manufacturing process technology 40 nm 28 nm
Texture fill rate 39.7 billion/sec 30.4 billion/sec
Floating-point performance 952.3 gflops 729.6 gflops
Memory bus width 256 Bit 128bit
Memory clock speed 1500 MHz 2000 MHz
Memory bandwidth 96.0 GB/s 64.0 GB/s
Shared memory - -
DirectX 12 API 12 API
Shader Model 5.1 5.1
OpenGL 4.5 4.5
OpenCL 1.1 1.1
Vulkan N/A 1.1.126
CUDA + +
CUDA cores 384 384
Bus support PCI-E 2.0 PCI Express 2.0, PCI Express 3.0
SLI options + +
HDMI +
HDCP +
Maximum VGA resolution Up to 2048x1536
3D Blu-Ray +
3D Gaming +
Bitcoin / BTC (SHA256) 40 Mh/s 36 Mh/s
Laptop size large large
Optimus + +
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