Radeon HD 6990M Crossfire vs Radeon Pro SSG

When choosing between Radeon HD 6990M Crossfire and Radeon Pro SSG, 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 Radeon HD 6990M Crossfire and Radeon Pro SSG.

Radeon HD 6990M Crossfire is a Laptop Graphics Card

Note: Radeon HD 6990M Crossfire 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 Radeon HD 6990M Crossfire here:

Main Specs

  Radeon HD 6990M Crossfire Radeon Pro SSG
Power consumption (TDP) 350 Watt
Interface PCIe 3.0 x16
Supplementary power connectors 1x 6-pin + 1x 8-pin
Memory type GDDR5 HBM2
Maximum RAM amount 2x2 GB 16 GB
Display Connectors 6x mini-DisplayPort
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  • Radeon Pro SSG has 14 GB more memory, than Radeon HD 6990M Crossfire.
  • Radeon HD 6990M Crossfire is used in Laptops, and Radeon Pro SSG - in Desktops.
  • Radeon HD 6990M Crossfire is build with Terascale 2 architecture, and Radeon Pro SSG - with GCN 5.0.
  • Core clock speed of Radeon Pro SSG is 725 MHz higher, than Radeon HD 6990M Crossfire.
  • Radeon HD 6990M Crossfire is manufactured by 40 nm process technology, and Radeon Pro SSG - by 14 nm process technology.
  • Memory clock speed of Radeon Pro SSG is 990 MHz higher, than Radeon HD 6990M Crossfire.

Game benchmarks

high / 1080p 35−40 50−55
ultra / 1080p 21−24 35−40
QHD / 1440p 16−18 27−30
4K / 2160p 10−11 16−18
low / 720p 60−65 80−85
medium / 1080p 40−45 60−65
The average gaming FPS of Radeon Pro SSG in Assassin's Creed Odyssey is 43% more, than Radeon HD 6990M Crossfire.

Full Specs

  Radeon HD 6990M Crossfire Radeon Pro SSG
Architecture Terascale 2 GCN 5.0
Code name Blackcomb XTX Vega 10
Type Laptop Workstation
Release date 12 July 2011 8 August 2017
Pipelines 2240 4096
Core clock speed 715 MHz 1440 MHz
Boost Clock 1500 MHz
Transistor count 2x1700 Million 12,500 million
Manufacturing process technology 40 nm 14 nm
Texture fill rate 384.0
Floating-point performance 12,288 gflops
Length 267 mm
Memory bus width 256 Bit 2048 Bit
Memory clock speed 900 MHz 1890 MHz
Memory bandwidth 483.8 GB/s
Shared memory -
DirectX DirectX 11, Shader 5.0 12 (12_1)
Shader Model 6.4
OpenGL 4.6
OpenCL 2.0
Vulkan 1.1.125
Laptop size large
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