GeForce GTX 660M vs GeForce GTX 870M

When choosing between GeForce GTX 660M and GeForce GTX 870M, 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 660M and GeForce GTX 870M.

GeForce GTX 660M and GeForce GTX 870M are Laptop Graphics Cards

Note: GeForce GTX 660M and GeForce GTX 870M 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 GeForce GTX 870M here:

Main Specs

  GeForce GTX 660M GeForce GTX 870M
Power consumption (TDP) 50 Watt 100 Watt
Interface MXM-B (3.0) MXM-B (3.0)
Supplementary power connectors None
Memory type GDDR5 GDDR5
Maximum RAM amount 2 GB 6 GB
Display Connectors No outputs No outputs
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  • GeForce GTX 870M 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 870M has 4 GB more memory, than GeForce GTX 660M.
  • Both cards are used in Laptops.
  • GeForce GTX 660M and GeForce GTX 870M are build with Kepler architecture.
  • Core clock speed of GeForce GTX 870M is 106 MHz higher, than GeForce GTX 660M.
  • GeForce GTX 660M and GeForce GTX 870M are manufactured by 28 nm process technology.

Game benchmarks

high / 1080p 6−7 16−18
ultra / 1080p 4−5 10−11
QHD / 1440p 0−1 4−5
low / 720p 16−18 35−40
medium / 1080p 8−9 21−24
The average gaming FPS of GeForce GTX 870M in Assassin's Creed Odyssey is 133% more, than GeForce GTX 660M.

Full Specs

  GeForce GTX 660M GeForce GTX 870M
Architecture Kepler Kepler
Code name N13E-GE N15P-GT
Type Laptop Laptop
Release date 22 March 2012 12 March 2014
Pipelines 384 1344
Core clock speed 835 MHz 941 MHz
Boost Clock 950 MHz 967 MHz
Transistor count 1,270 million 3,540 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 30.4 billion/sec 108.3
Floating-point performance 729.6 gflops 2,599 gflops
Memory bus width 128bit 192 Bit
Memory clock speed 2000 MHz
Memory bandwidth 64.0 GB/s 120.0 GB/s
Shared memory - -
DirectX 12 API 12 (11_0)
Shader Model 5.1 5.1
OpenGL 4.5 4.5
OpenCL 1.1 1.1
Vulkan 1.1.126 1.1.126
CUDA + +
CUDA cores 384 1344
Bus support PCI Express 2.0, PCI Express 3.0 PCI Express 2.0, PCI Express 3.0
SLI options + +
HDMI + +
HDCP +
Maximum VGA resolution Up to 2048x1536
Bitcoin / BTC (SHA256) 36 Mh/s 82 Mh/s
Laptop size large large
Standard memory configuration GDDR5
eDP 1.2 signal support Up to 3840x2160
LVDS signal support Up to 1920x1200
DisplayPort Multimode (DP++) support Up to 3840x2160
HDCP content protection +
7.1 channel HD audio on HDMI +
TrueHD and DTS-HD audio bitstreaming +
H.264, VC1, MPEG2 1080p video decoder +
Optimus + +
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