Radeon HD 7990 vs Radeon Pro 555X

Find out if it is worth upgrading your current GPU setup by comparing Radeon HD 7990 and Radeon Pro 555X. Here you can take a closer look at graphics cards specs, such as core clock speed, memory type and size, display connectors, etc. The price, overall benchmark and gaming performances are usually defining factors when it comes to choosing between Radeon HD 7990 and Radeon Pro 555X. Make sure that the graphics card has compatible dimensions and will properly fit in your new or current computer case. Also these graphics cards may have different system power recommendations, so take that into consideration and upgrade your PSU if necessary.

Radeon Pro 555X is a Laptop Graphics Card

Note: Radeon Pro 555X 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 Pro 555X here:

Main Specs

  Radeon HD 7990 Radeon Pro 555X
Power consumption (TDP) 375 Watt 75 Watt
Interface PCIe 3.0 x16 PCIe 3.0 x8
Supplementary power connectors 2x 8-pin None
Memory type GDDR5 GDDR5
Maximum RAM amount 3 GB 2 GB
Display Connectors 1x DVI, 4x mini-DisplayPort No outputs
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  • Radeon HD 7990 has 400% more power consumption, than Radeon Pro 555X.
  • Radeon HD 7990 is connected by PCIe 3.0 x16, and Radeon Pro 555X uses PCIe 3.0 x8 interface.
  • Radeon HD 7990 has 1 GB more memory, than Radeon Pro 555X.
  • Radeon HD 7990 is used in Desktops, and Radeon Pro 555X - in Mobile workstations.
  • Radeon HD 7990 is build with GCN 1.0 architecture, and Radeon Pro 555X - with Polaris.
  • Core clock speed of Radeon HD 7990 is 95 MHz higher, than Radeon Pro 555X.
  • Radeon HD 7990 is manufactured by 28 nm process technology, and Radeon Pro 555X - by 14 nm process technology.
  • Memory clock speed of Radeon HD 7990 is 920 MHz higher, than Radeon Pro 555X.

Game benchmarks

high / 1080p 35−40 16−18
ultra / 1080p 21−24 10−11
QHD / 1440p 16−18 4−5
4K / 2160p 10−11 4−5
low / 720p 60−65 30−35
medium / 1080p 40−45 21−24
The average gaming FPS of Radeon HD 7990 in Assassin's Creed Odyssey is 113% more, than Radeon Pro 555X.

Full Specs

  Radeon HD 7990 Radeon Pro 555X
Architecture GCN 1.0 Polaris
Code name Malta Polaris 21
Type Desktop Mobile workstation
Release date 24 April 2013 5 June 2017
Pipelines 2048 768
Core clock speed 950 MHz 855 MHz
Boost Clock 1000 MHz
Transistor count 4,313 million 3,000 million
Manufacturing process technology 28 nm 14 nm
Texture fill rate 128.0 43.54
Floating-point performance 2x 4,096 gflops
Length 307 mm
Memory bus width 384 Bit 128 Bit
Memory clock speed 6000 MHz 5080 MHz
Memory bandwidth 288.0 GB/s 81.6 GB/s
Shared memory -
DirectX 12 (11_1) 12 (12_0)
Shader Model 5.1 6.4
OpenGL 4.6 4.6
OpenCL 1.2 2.0
Vulkan 1.2.131 1.2.131
FreeSync +
Bitcoin / BTC (SHA256) 459 Mh/s
Laptop size large
Ethereum / ETH (DaggerHashimoto) 44 Mh/s
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