GeForce GTX 675M SLI vs Radeon HD 7990

If you are going to buy a new graphics card and are choosing between GeForce GTX 675M SLI and Radeon HD 7990, there are a couple of things to consider. Cards with more VRAM in general perform better and allow you to play on higher graphics settings. Size also makes a difference. A model with a large heatsink can occupy up to three expansion slots on a motherboard. Be sure you have enough room in your PC case. When comparing GPUs with different architectures, more processing cores and even higher TFLOPS will not always translate to better performance. To help you decide which GPU you need, we have measured frame rates in a number of popular games. For more on how the GeForce GTX 675M SLI stacks up against Radeon HD 7990, check out specs charts below.

GeForce GTX 675M SLI is a Laptop Graphics Card

Note: GeForce GTX 675M SLI is only used in laptop graphics. It has 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 here:

Main Specs

  GeForce GTX 675M SLI Radeon HD 7990
Power consumption (TDP) 2x 100 Watt 375 Watt
Interface PCIe 3.0 x16
Supplementary power connectors 2x 8-pin
Memory type GDDR5 GDDR5
Maximum RAM amount 3 GB
Display Connectors 1x DVI, 4x mini-DisplayPort
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  • Radeon HD 7990 has 18650% more power consumption, than GeForce GTX 675M SLI.
  • GeForce GTX 675M SLI is used in Laptops, and Radeon HD 7990 - in Desktops.
  • GeForce GTX 675M SLI is build with Fermi architecture, and Radeon HD 7990 - with GCN 1.0.
  • Core clock speed of Radeon HD 7990 is 330 MHz higher, than GeForce GTX 675M SLI.
  • GeForce GTX 675M SLI is manufactured by 40 nm process technology, and Radeon HD 7990 - by 28 nm process technology.
  • Memory clock speed of Radeon HD 7990 is 3000 MHz higher, than GeForce GTX 675M SLI.

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 7990 in Assassin's Creed Odyssey is 88% more, than GeForce GTX 675M SLI.

Full Specs

  GeForce GTX 675M SLI Radeon HD 7990
Architecture Fermi GCN 1.0
Code name N12E-GTX2 Malta
Type Laptop Desktop
Release date 6 January 2011 24 April 2013
Pipelines 768 2048
Core clock speed 620 MHz 950 MHz
Boost Clock 1000 MHz
Transistor count 4,313 million
Manufacturing process technology 40 nm 28 nm
Texture fill rate 128.0
Floating-point performance 2x 4,096 gflops
Length 307 mm
Memory bus width 256 Bit 384 Bit
Memory clock speed 3000 MHz 6000 MHz
Memory bandwidth 288.0 GB/s
Shared memory -
DirectX DirectX 11, Shader 5.0 12 (11_1)
Shader Model 5.1
OpenGL 4.6
OpenCL 1.2
Vulkan 1.2.131
CUDA +
SLI options +
Bitcoin / BTC (SHA256) 459 Mh/s
Laptop size large
Optimus +
Ethereum / ETH (DaggerHashimoto) 44 Mh/s
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