Radeon HD 6990M vs Radeon HD 7950

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

Radeon HD 6990M is a Laptop Graphics Card

Note: Radeon HD 6990M 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 here:

Main Specs

  Radeon HD 6990M Radeon HD 7950
Power consumption (TDP) 100 Watt 200 Watt
Interface MXM-B (3.0) PCIe 3.0 x16
Supplementary power connectors None 2x 6-pin
Memory type GDDR5 GDDR5
Maximum RAM amount 2 GB 3 GB
Display Connectors No outputs 1x DVI, 1x HDMI, 2x mini-DisplayPort
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  • Radeon HD 7950 has 100% more power consumption, than Radeon HD 6990M.
  • Radeon HD 6990M is connected by MXM-B (3.0), and Radeon HD 7950 uses PCIe 3.0 x16 interface.
  • Radeon HD 7950 has 1 GB more memory, than Radeon HD 6990M.
  • Radeon HD 6990M is used in Laptops, and Radeon HD 7950 - in Desktops.
  • Radeon HD 6990M is build with Terascale 2 architecture, and Radeon HD 7950 - with GCN 1.0.
  • Radeon HD 6990M is manufactured by 40 nm process technology, and Radeon HD 7950 - by 28 nm process technology.
  • Memory clock speed of Radeon HD 7950 is 350 MHz higher, than Radeon HD 6990M.

Game benchmarks

high / 1080p 14−16 35−40
ultra / 1080p 8−9 21−24
QHD / 1440p 3−4 16−18
4K / 2160p 10−11
low / 720p 30−33 60−65
medium / 1080p 16−18 40−45
The average gaming FPS of Radeon HD 7950 in Assassin's Creed Odyssey is 140% more, than Radeon HD 6990M.

Full Specs

  Radeon HD 6990M Radeon HD 7950
Architecture Terascale 2 GCN 1.0
Code name Blackcomb XTX Tahiti
Type Laptop Desktop
Release date 12 July 2011 31 January 2012
Pipelines 1120 1792
Core clock speed 715 MHz
Boost Clock 1250 MHz
Transistor count 1,700 million 4,313 million
Manufacturing process technology 40 nm 28 nm
Texture fill rate 40.04 89.60
Floating-point performance 1,601.6 gflops 2,867 gflops
Length 267 mm
Memory bus width 256 Bit 384 Bit
Memory clock speed 900 MHz 1250 MHz
Memory bandwidth 115.2 GB/s 240 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
Monero / XMR (CryptoNight) 0.56 kh/s
FreeSync +
Bus support PCIe 3.0 x16
HDMI +
Bitcoin / BTC (SHA256) 381 Mh/s
Laptop size large
Eyefinity +
PowerTune +
ZeroCore +
Design reference
Number of Eyefinity displays 6
CrossFire +
Decred / DCR (Decred) 0.78 Gh/s
Ethereum / ETH (DaggerHashimoto) 13.86 Mh/s
Zcash / ZEC (Equihash) 250 Sol/s
Compute units 28
AppAcceleration +
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