GeForce GTX 675M SLI vs Radeon HD 6990M Crossfire

When comparing GeForce GTX 675M SLI and Radeon HD 6990M Crossfire, we look primarily at benchmarks and game tests. But it is not only about the numbers. Often you can find third-party models with higher clock speeds, better cooling, or a customizable RGB lighting. Not all of them will have all the features you need. Another thing to consider is the port selection. Most graphics cards have at least one DisplayPort and HDMI interface, but some monitors require DVI. Before you buy, check the TDP of the graphics card - this characteristic will help you estimate the consumption of the graphics card. You may even have to upgrade your PSU to meet its requirements. An important factor when choosing between GeForce GTX 675M SLI and Radeon HD 6990M Crossfire is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.

GeForce GTX 675M SLI and Radeon HD 6990M Crossfire are Laptop Graphics Cards

Note: GeForce GTX 675M SLI and Radeon HD 6990M 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 675M SLI or Radeon HD 6990M Crossfire here:

Main Specs

  GeForce GTX 675M SLI Radeon HD 6990M Crossfire
Power consumption (TDP) 2x 100 Watt
Memory type GDDR5 GDDR5
Maximum RAM amount 2x2 GB
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  • Both cards are used in Laptops.
  • GeForce GTX 675M SLI is build with Fermi architecture, and Radeon HD 6990M Crossfire - with Terascale 2.
  • Core clock speed of Radeon HD 6990M Crossfire is 95 MHz higher, than GeForce GTX 675M SLI.
  • GeForce GTX 675M SLI and Radeon HD 6990M Crossfire are manufactured by 40 nm process technology.
  • Memory clock speed of GeForce GTX 675M SLI is 2100 MHz higher, than Radeon HD 6990M Crossfire.

Game benchmarks

high / 1080p 18−20 35−40
ultra / 1080p 10−12 21−24
QHD / 1440p 5−6 16−18
4K / 2160p 4−5 10−11
low / 720p 35−40 60−65
medium / 1080p 24−27 40−45
The average gaming FPS of Radeon HD 6990M Crossfire in Assassin's Creed Odyssey is 88% more, than GeForce GTX 675M SLI.

Full Specs

  GeForce GTX 675M SLI Radeon HD 6990M Crossfire
Architecture Fermi Terascale 2
Code name N12E-GTX2 Blackcomb XTX
Type Laptop Laptop
Release date 6 January 2011 12 July 2011
Pipelines 768 2240
Core clock speed 620 MHz 715 MHz
Transistor count 2x1700 Million
Manufacturing process technology 40 nm 40 nm
Memory bus width 256 Bit 256 Bit
Memory clock speed 3000 MHz 900 MHz
Shared memory - -
DirectX DirectX 11, Shader 5.0 DirectX 11, Shader 5.0
CUDA +
SLI options +
Laptop size large large
Optimus +
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