Radeon HD 6990M Crossfire vs Radeon HD 7970

Find out if it is worth upgrading your current GPU setup by comparing Radeon HD 6990M Crossfire and Radeon HD 7970. 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 6990M Crossfire and Radeon HD 7970. 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 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 HD 7970
Power consumption (TDP) 300 Watt
Interface PCIe 3.0 x16
Supplementary power connectors 1x 6-pin + 1x 8-pin
Memory type GDDR5 GDDR5
Maximum RAM amount 2x2 GB 3 GB
Display Connectors 1x DVI, 1x HDMI, 2x mini-DisplayPort
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  • Radeon HD 7970 has 1 GB more memory, than Radeon HD 6990M Crossfire.
  • Radeon HD 6990M Crossfire is used in Laptops, and Radeon HD 7970 - in Desktops.
  • Radeon HD 6990M Crossfire is build with Terascale 2 architecture, and Radeon HD 7970 - with GCN.
  • Radeon HD 6990M Crossfire is manufactured by 40 nm process technology, and Radeon HD 7970 - by 28 nm process technology.
  • Memory clock speed of Radeon HD 7970 is 475 MHz higher, than Radeon HD 6990M Crossfire.

Game benchmarks

high / 1080p 35−40 35−40
ultra / 1080p 21−24 21−24
QHD / 1440p 16−18 16−18
4K / 2160p 10−11 10−11
low / 720p 60−65 60−65
medium / 1080p 40−45 40−45
Radeon HD 6990M Crossfire and Radeon HD 7970 have the same average FPS in Assassin's Creed Odyssey.

Full Specs

  Radeon HD 6990M Crossfire Radeon HD 7970
Architecture Terascale 2 GCN
Code name Blackcomb XTX Tahiti XT
Type Laptop Desktop
Release date 12 July 2011 22 December 2011
Pipelines 2240 2048
Core clock speed 715 MHz
Boost Clock 925 MHz
Transistor count 2x1700 Million 4,313 million
Manufacturing process technology 40 nm 28 nm
Texture fill rate 118.4
Floating-point performance 3,789 gflops
Length 274 mm
Memory bus width 256 Bit 384 Bit
Memory clock speed 900 MHz 1375 MHz
Memory bandwidth 264 GB/s
Shared memory - -
DirectX DirectX 11, Shader 5.0
Shader Model 5.1
OpenGL 4.6
OpenCL 1.2
FreeSync +
Bus support PCIe 2.1 x16
HDMI +
Bitcoin / BTC (SHA256) 485 Mh/s
Laptop size large
Eyefinity +
Design reference
CrossFire +
Ethereum / ETH (DaggerHashimoto) 20.71 Mh/s
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