Radeon HD 6990 vs Radeon HD 7950

When choosing between Radeon HD 6990 and Radeon HD 7950, 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 6990 and Radeon HD 7950.

Main Specs

  Radeon HD 6990 Radeon HD 7950
Power consumption (TDP) 375 Watt 200 Watt
Interface PCIe 2.0 x16 PCIe 3.0 x16
Supplementary power connectors 2x 8-pin 2x 6-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 87% more power consumption, than Radeon HD 7950.
  • Radeon HD 6990 is connected by PCIe 2.0 x16, and Radeon HD 7950 uses PCIe 3.0 x16 interface.
  • Radeon HD 7950 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 7950 - with GCN 1.0.
  • Radeon HD 6990 is manufactured by 40 nm process technology, and Radeon HD 7950 - by 28 nm process technology.
  • Radeon HD 6990 is 28 mm longer, than Radeon HD 7950.
  • Memory clock speed of Radeon HD 6990 is 3750 MHz higher, than Radeon HD 7950.

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 7950 in Assassin's Creed Odyssey is 140% more, than Radeon HD 6990.

Full Specs

  Radeon HD 6990 Radeon HD 7950
Architecture TeraScale 3 GCN 1.0
Code name Antilles Tahiti
Type Desktop Desktop
Release date 8 March 2011 31 January 2012
Pipelines 1536 1792
Core clock speed 830 MHz
Boost Clock 1250 MHz
Transistor count 2,640 million 4,313 million
Manufacturing process technology 40 nm 28 nm
Texture fill rate 79.68 89.60
Floating-point performance 2x 2,549.8 gflops 2,867 gflops
Length 295 mm 267 mm
Memory bus width 256 Bit 384 Bit
Memory clock speed 5000 MHz 1250 MHz
Memory bandwidth 160.0 GB/s 240 GB/s
DirectX 11.2 (11_0)
Shader Model 5.0 5.1
OpenGL 4.4 4.6
OpenCL 1.2 1.2
Vulkan N/A
Monero / XMR (CryptoNight) 0.56 kh/s
FreeSync +
Bus support PCIe 3.0 x16
HDMI +
Bitcoin / BTC (SHA256) 265 Mh/s 381 Mh/s
Eyefinity +
PowerTune +
ZeroCore +
Design reference
Number of Eyefinity displays 6
CrossFire +
Decred / DCR (Decred) 0.78 Gh/s
Ethereum / ETH (DaggerHashimoto) 24 Mh/s 13.86 Mh/s
Zcash / ZEC (Equihash) 250 Sol/s
Compute units 28
AppAcceleration +
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