Radeon HD 6990M vs Radeon R9 M280X

Find out if it is worth upgrading your current GPU setup by comparing Radeon HD 6990M and Radeon R9 M280X. 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 and Radeon R9 M280X. 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 and Radeon R9 M280X are Laptop Graphics Cards

Note: Radeon HD 6990M and Radeon R9 M280X 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 R9 M280X here:

Main Specs

  Radeon HD 6990M Radeon R9 M280X
Power consumption (TDP) 100 Watt
Interface MXM-B (3.0) PCIe 3.0 x16
Supplementary power connectors None
Memory type GDDR5 Not Listed
Maximum RAM amount 2 GB
Display Connectors No outputs No outputs
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  • Radeon HD 6990M is connected by MXM-B (3.0), and Radeon R9 M280X uses PCIe 3.0 x16 interface.
  • Both cards are used in Laptops.
  • Radeon HD 6990M is build with Terascale 2 architecture, and Radeon R9 M280X - with GCN.
  • Core clock speed of Radeon R9 M280X is 185 MHz higher, than Radeon HD 6990M.
  • Radeon HD 6990M is manufactured by 40 nm process technology, and Radeon R9 M280X - by 28 nm process technology.

Game benchmarks

high / 1080p 14−16 2−3
ultra / 1080p 8−9 1−2
QHD / 1440p 3−4 0−1
low / 720p 30−33 14−16
medium / 1080p 16−18 4−5
The average gaming FPS of Radeon HD 6990M in Assassin's Creed Odyssey is 260% more, than Radeon R9 M280X.

Full Specs

  Radeon HD 6990M Radeon R9 M280X
Architecture Terascale 2 GCN
Code name Blackcomb XTX Saturn XT
Type Laptop Laptop
Release date 12 July 2011 1 February 2015
Pipelines 1120 896
Core clock speed 715 MHz 900 MHz
Transistor count 1,700 million 2,080 million
Manufacturing process technology 40 nm 28 nm
Texture fill rate 40.04 61.60
Floating-point performance 1,601.6 gflops 1,792 gflops
Memory bus width 256 Bit
Memory clock speed 900 MHz
Memory bandwidth 115.2 GB/s 96 GB/s
Shared memory - -
DirectX 11.2 (11_0)
Shader Model 5.0 6.3
OpenGL 4.4 4.4
OpenCL 1.2 Not Listed
Vulkan N/A
FreeSync +
Bus support Not Listed
Laptop size large large
HD3D +
PowerTune +
DualGraphics +
ZeroCore +
Switchable graphics +
Mantle +
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