GeForce GTX 660M vs UHD Graphics 620

When choosing between GeForce GTX 660M and UHD Graphics 620, 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 UHD Graphics 620.

GeForce GTX 660M and UHD Graphics 620 are Laptop Graphics Cards

Note: GeForce GTX 660M and UHD Graphics 620 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 UHD Graphics 620 here:

Main Specs

  GeForce GTX 660M UHD Graphics 620
Power consumption (TDP) 50 Watt 15 Watt
Interface MXM-B (3.0) PCIe 3.0 x1
Memory type GDDR5 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 UHD Graphics 620.
  • GeForce GTX 660M is connected by MXM-B (3.0), and UHD Graphics 620 uses PCIe 3.0 x1 interface.
  • UHD Graphics 620 has 30 GB more memory, than GeForce GTX 660M.
  • Both cards are used in Laptops.
  • GeForce GTX 660M is build with Kepler architecture, and UHD Graphics 620 - with Gen. 9.5.
  • Core clock speed of GeForce GTX 660M is 535 MHz higher, than UHD Graphics 620.
  • GeForce GTX 660M is manufactured by 28 nm process technology, and UHD Graphics 620 - by 14 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 UHD Graphics 620.

Full Specs

  GeForce GTX 660M UHD Graphics 620
Architecture Kepler Gen. 9.5
Code name N13E-GE Kaby-Lake-Refresh GT2
Type Laptop Laptop
Release date 22 March 2012 1 September 2017
Pipelines 384 24
Core clock speed 835 MHz 300 MHz
Boost Clock 950 MHz 1150 MHz
Transistor count 1,270 million 189 million
Manufacturing process technology 28 nm 14 nm
Texture fill rate 30.4 billion/sec 27.60
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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