GeForce GTX 660M vs Iris Plus Graphics 640

In this comparison between GeForce GTX 660M and Iris Plus Graphics 640 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 Iris Plus Graphics 640 will be their preference. Study the comparison tables below and make your choice.

GeForce GTX 660M and Iris Plus Graphics 640 are Laptop Graphics Cards

Note: GeForce GTX 660M and Iris Plus Graphics 640 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 Iris Plus Graphics 640 here:

Main Specs

  GeForce GTX 660M Iris Plus Graphics 640
Power consumption (TDP) 50 Watt 15 Watt
Interface MXM-B (3.0) PCIe 3.0 x1
Memory type GDDR5 DDR3L/LPDDR3/DDR4
Maximum RAM amount 2 GB 32 GB
Display Connectors No outputs No outputs
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  • GeForce GTX 660M has 233% more power consumption, than Iris Plus Graphics 640.
  • GeForce GTX 660M is connected by MXM-B (3.0), and Iris Plus Graphics 640 uses PCIe 3.0 x1 interface.
  • Iris Plus Graphics 640 has 30 GB more memory, than GeForce GTX 660M.
  • Both cards are used in Laptops.
  • GeForce GTX 660M is build with Kepler architecture, and Iris Plus Graphics 640 - with Gen. 9.5 Kaby Lake.
  • Core clock speed of GeForce GTX 660M is 535 MHz higher, than Iris Plus Graphics 640.
  • GeForce GTX 660M is manufactured by 28 nm process technology, and Iris Plus Graphics 640 - by 14 nm process technology.

Game benchmarks

high / 1080p 6−7 6−7
ultra / 1080p 4−5 4−5
QHD / 1440p 0−1 0−1
low / 720p 16−18 16−18
medium / 1080p 8−9 8−9
GeForce GTX 660M and Iris Plus Graphics 640 have the same average FPS in Assassin's Creed Odyssey.

Full Specs

  GeForce GTX 660M Iris Plus Graphics 640
Architecture Kepler Gen. 9.5 Kaby Lake
Code name N13E-GE Kaby Lake GT3e
Type Laptop Laptop
Release date 22 March 2012 3 January 2017
Pipelines 384 48
Core clock speed 835 MHz 300 MHz
Boost Clock 950 MHz 1050 MHz
Transistor count 1,270 million 189 million
Manufacturing process technology 28 nm 14 nm
Texture fill rate 30.4 billion/sec 52.80
Floating-point performance 729.6 gflops
Memory bus width 128bit 64/128 Bit
Memory clock speed 2000 MHz
Memory bandwidth 64.0 GB/s
Shared memory - +
DirectX 12 API 12 (12_1)
Shader Model 5.1 6.4
OpenGL 4.5 4.6
OpenCL 1.1 2.1
Vulkan 1.1.126 1.1.103
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 +
Quick Sync +
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