Radeon HD 6990M vs Radeon R7 M275DX

When comparing Radeon HD 6990M and Radeon R7 M275DX, we look primarily at benchmarks and game tests. But it is not only about the numbers. Often you can find third-party models with higher clock speeds, better cooling, or a customizable RGB lighting. Not all of them will have all the features you need. Another thing to consider is the port selection. Most graphics cards have at least one DisplayPort and HDMI interface, but some monitors require DVI. Before you buy, check the TDP of the graphics card - this characteristic will help you estimate the consumption of the graphics card. You may even have to upgrade your PSU to meet its requirements. An important factor when choosing between Radeon HD 6990M and Radeon R7 M275DX is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.

Radeon HD 6990M and Radeon R7 M275DX are Laptop Graphics Cards

Note: Radeon HD 6990M and Radeon R7 M275DX are only used in laptop graphics. They have 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 or Radeon R7 M275DX here:

Main Specs

  Radeon HD 6990M Radeon R7 M275DX
Power consumption (TDP) 100 Watt
Interface MXM-B (3.0)
Supplementary power connectors None
Memory type GDDR5 DDR3
Maximum RAM amount 2 GB
Display Connectors No outputs
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  • Both cards are used in Laptops.
  • Radeon HD 6990M is build with Terascale 2 architecture, and Radeon R7 M275DX - with GCN.
  • Radeon HD 6990M is manufactured by 40 nm process technology, and Radeon R7 M275DX - by 28 nm process technology.

Game benchmarks

high / 1080p 14−16 9−10
ultra / 1080p 8−9 5−6
QHD / 1440p 3−4 0−1
low / 720p 30−33 21−24
medium / 1080p 16−18 10−12
The average gaming FPS of Radeon HD 6990M in Assassin's Creed Odyssey is 50% more, than Radeon R7 M275DX.

Full Specs

  Radeon HD 6990M Radeon R7 M275DX
Architecture Terascale 2 GCN
Code name Blackcomb XTX
Type Laptop Laptop
Release date 12 July 2011 4 June 2014
Pipelines 1120 896
Core clock speed 715 MHz
Transistor count 1,700 million
Manufacturing process technology 40 nm 28 nm
Texture fill rate 40.04
Floating-point performance 1,601.6 gflops
Memory bus width 256 Bit
Memory clock speed 900 MHz
Memory bandwidth 115.2 GB/s
Shared memory - +
DirectX 11.2 (11_0) DirectX 12, Shader 5.0
Shader Model 5.0
OpenGL 4.4
OpenCL 1.2
Vulkan N/A
Laptop size large medium sized
Eyefinity +
AppAcceleration +
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