Radeon HD 6990 vs Radeon HD 7970

Find out if it is worth upgrading your current GPU setup by comparing Radeon HD 6990 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 6990 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.

Main Specs

  Radeon HD 6990 Radeon HD 7970
Power consumption (TDP) 375 Watt 300 Watt
Interface PCIe 2.0 x16 PCIe 3.0 x16
Supplementary power connectors 2x 8-pin 1x 6-pin + 1x 8-pin
Memory type GDDR5 GDDR5
Maximum RAM amount 2 GB 3 GB
Display Connectors 1x DVI, 4x mini-DisplayPort 1x DVI, 1x HDMI, 2x mini-DisplayPort
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  • Radeon HD 6990 has 25% more power consumption, than Radeon HD 7970.
  • Radeon HD 6990 is connected by PCIe 2.0 x16, and Radeon HD 7970 uses PCIe 3.0 x16 interface.
  • Radeon HD 7970 has 1 GB more memory, than Radeon HD 6990.
  • Both cards are used in Desktops.
  • Radeon HD 6990 is build with TeraScale 3 architecture, and Radeon HD 7970 - with GCN.
  • Radeon HD 6990 is manufactured by 40 nm process technology, and Radeon HD 7970 - by 28 nm process technology.
  • Radeon HD 6990 is 21 mm longer, than Radeon HD 7970.
  • Memory clock speed of Radeon HD 6990 is 3625 MHz higher, than Radeon HD 7970.

Game benchmarks

high / 1080p 14−16 35−40
ultra / 1080p 9−10 21−24
QHD / 1440p 3−4 16−18
4K / 2160p 10−11
low / 720p 30−35 60−65
medium / 1080p 18−20 40−45
The average gaming FPS of Radeon HD 7970 in Assassin's Creed Odyssey is 140% more, than Radeon HD 6990.

Full Specs

  Radeon HD 6990 Radeon HD 7970
Architecture TeraScale 3 GCN
Code name Antilles Tahiti XT
Type Desktop Desktop
Release date 8 March 2011 22 December 2011
Pipelines 1536 2048
Core clock speed 830 MHz
Boost Clock 925 MHz
Transistor count 2,640 million 4,313 million
Manufacturing process technology 40 nm 28 nm
Texture fill rate 79.68 118.4
Floating-point performance 2x 2,549.8 gflops 3,789 gflops
Length 295 mm 274 mm
Memory bus width 256 Bit 384 Bit
Memory clock speed 5000 MHz 1375 MHz
Memory bandwidth 160.0 GB/s 264 GB/s
Shared memory -
DirectX 11.2 (11_0)
Shader Model 5.0 5.1
OpenGL 4.4 4.6
OpenCL 1.2 1.2
Vulkan N/A
FreeSync +
Bus support PCIe 2.1 x16
HDMI +
Bitcoin / BTC (SHA256) 265 Mh/s 485 Mh/s
Eyefinity +
Design reference
CrossFire +
Ethereum / ETH (DaggerHashimoto) 24 Mh/s 20.71 Mh/s
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