Radeon HD 6990M Crossfire vs Radeon R9 280X

When comparing Radeon HD 6990M Crossfire and Radeon R9 280X, 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 Crossfire and Radeon R9 280X is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.

Radeon HD 6990M Crossfire is a Laptop Graphics Card

Note: Radeon HD 6990M Crossfire 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 Crossfire here:

Main Specs

  Radeon HD 6990M Crossfire Radeon R9 280X
Power consumption (TDP) 250 Watt
Interface PCIe 3.0 x16
Supplementary power connectors 1 x 6-pin + 1 x 8-pin
Memory type GDDR5 GDDR5
Maximum RAM amount 2x2 GB 3 GB
Display Connectors 2x DVI, 1x HDMI, 1x DisplayPort
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  • Radeon R9 280X has 1 GB more memory, than Radeon HD 6990M Crossfire.
  • Radeon HD 6990M Crossfire is used in Laptops, and Radeon R9 280X - in Desktops.
  • Radeon HD 6990M Crossfire is build with Terascale 2 architecture, and Radeon R9 280X - with GCN.
  • Radeon HD 6990M Crossfire is manufactured by 40 nm process technology, and Radeon R9 280X - by 28 nm process technology.

Game benchmarks

high / 1080p 35−40 35−40
ultra / 1080p 21−24 21−24
QHD / 1440p 16−18 16−18
4K / 2160p 10−11 10−11
low / 720p 60−65 60−65
medium / 1080p 40−45 40−45
Radeon HD 6990M Crossfire and Radeon R9 280X have the same average FPS in Assassin's Creed Odyssey.

Full Specs

  Radeon HD 6990M Crossfire Radeon R9 280X
Architecture Terascale 2 GCN
Code name Blackcomb XTX Thaiti XTL
Type Laptop Desktop
Release date 12 July 2011 8 October 2013
Pipelines 2240 2048
Core clock speed 715 MHz
Boost Clock 1000 MHz
Transistor count 2x1700 Million 4,313 million
Manufacturing process technology 40 nm 28 nm
Texture fill rate 128.0
Floating-point performance 4,096 gflops
Length 275 mm
Memory bus width 256 Bit 384 Bit
Memory clock speed 900 MHz
Memory bandwidth 288 GB/s
Shared memory - -
DirectX DirectX 11, Shader 5.0
Shader Model 5.1
OpenGL 4.6
OpenCL 1.2
Vulkan +
Monero / XMR (CryptoNight) 0.5 kh/s
FreeSync +
Bus support PCIe 3.0
HDMI +
Bitcoin / BTC (SHA256) 494 Mh/s
Laptop size large
Eyefinity +
HD3D +
TrueAudio +
Design reference
DisplayPort support +
CrossFire +
DDMA audio +
Decred / DCR (Decred) 1.07 Gh/s
Ethereum / ETH (DaggerHashimoto) 14.42 Mh/s
Zcash / ZEC (Equihash) 285 Sol/s
AppAcceleration +
LiquidVR +
TressFX +
UVD +
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