Radeon HD 6990M Crossfire vs Radeon Pro 555

When choosing between Radeon HD 6990M Crossfire and Radeon Pro 555, 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 555.

Radeon HD 6990M Crossfire and Radeon Pro 555 are Laptop Graphics Cards

Note: Radeon HD 6990M Crossfire and Radeon Pro 555 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 Radeon HD 6990M Crossfire or Radeon Pro 555 here:

Main Specs

  Radeon HD 6990M Crossfire Radeon Pro 555
Power consumption (TDP) 75 Watt
Interface PCIe 3.0 x8
Supplementary power connectors None
Memory type GDDR5 GDDR5
Maximum RAM amount 2x2 GB 2 GB
Display Connectors No outputs
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  • Radeon HD 6990M Crossfire and Radeon Pro 555 have maximum RAM of 2 GB.
  • Radeon HD 6990M Crossfire is used in Laptops, and Radeon Pro 555 - in Mobile workstations.
  • Radeon HD 6990M Crossfire is build with Terascale 2 architecture, and Radeon Pro 555 - with Polaris.
  • Core clock speed of Radeon Pro 555 is 140 MHz higher, than Radeon HD 6990M Crossfire.
  • Radeon HD 6990M Crossfire is manufactured by 40 nm process technology, and Radeon Pro 555 - by 14 nm process technology.
  • Memory clock speed of Radeon Pro 555 is 4180 MHz higher, than Radeon HD 6990M Crossfire.

Game benchmarks

high / 1080p 35−40 16−18
ultra / 1080p 21−24 9−10
QHD / 1440p 16−18 4−5
4K / 2160p 10−11 4−5
low / 720p 60−65 30−35
medium / 1080p 40−45 20−22
The average gaming FPS of Radeon HD 6990M Crossfire in Assassin's Creed Odyssey is 128% more, than Radeon Pro 555.

Full Specs

  Radeon HD 6990M Crossfire Radeon Pro 555
Architecture Terascale 2 Polaris
Code name Blackcomb XTX Polaris 21
Type Laptop Mobile workstation
Release date 12 July 2011 5 June 2017
Pipelines 2240 768
Core clock speed 715 MHz 855 MHz
Transistor count 2x1700 Million 3,000 million
Manufacturing process technology 40 nm 14 nm
Texture fill rate 40.80
Floating-point performance 1,306 gflops
Memory bus width 256 Bit 128 Bit
Memory clock speed 900 MHz 5080 MHz
Memory bandwidth 81.6 GB/s
Shared memory - -
DirectX DirectX 11, Shader 5.0 12 (12_0)
Shader Model 6.4
OpenGL 4.6
OpenCL 2.0
Vulkan 1.2.131
FreeSync +
Laptop size large large
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