Radeon HD 6990M Crossfire vs Radeon R9 380X

If you are going to buy a new graphics card and are choosing between Radeon HD 6990M Crossfire and Radeon R9 380X, there are a couple of things to consider. Cards with more VRAM in general perform better and allow you to play on higher graphics settings. Size also makes a difference. A model with a large heatsink can occupy up to three expansion slots on a motherboard. Be sure you have enough room in your PC case. When comparing GPUs with different architectures, more processing cores and even higher TFLOPS will not always translate to better performance. To help you decide which GPU you need, we have measured frame rates in a number of popular games. For more on how the Radeon HD 6990M Crossfire stacks up against Radeon R9 380X, check out specs charts below.

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 380X
Power consumption (TDP) 190 Watt
Interface PCIe 3.0 x16
Memory type GDDR5 GDDR5
Maximum RAM amount 2x2 GB 4 GB
Display Connectors 2x DVI, 1x HDMI, 1x DisplayPort
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  • Radeon R9 380X has 2 GB more memory, than Radeon HD 6990M Crossfire.
  • Radeon HD 6990M Crossfire is used in Laptops, and Radeon R9 380X - in Desktops.
  • Radeon HD 6990M Crossfire is build with Terascale 2 architecture, and Radeon R9 380X - with GCN 3.0.
  • Radeon HD 6990M Crossfire is manufactured by 40 nm process technology, and Radeon R9 380X - by 28 nm process technology.
  • Memory clock speed of Radeon R9 380X is 70 MHz higher, than Radeon HD 6990M Crossfire.

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 380X have the same average FPS in Assassin's Creed Odyssey.

Full Specs

  Radeon HD 6990M Crossfire Radeon R9 380X
Architecture Terascale 2 GCN 3.0
Code name Blackcomb XTX Antigua
Type Laptop Desktop
Release date 12 July 2011 19 November 2015
Pipelines 2240 2048
Core clock speed 715 MHz
Boost Clock 970 MHz
Transistor count 2x1700 Million 5,000 million
Manufacturing process technology 40 nm 28 nm
Texture fill rate 124.2
Floating-point performance 3,973 gflops
Length 221 mm
Memory bus width 256 Bit 256 Bit
Memory clock speed 900 MHz 970 MHz
Memory bandwidth 182.4 GB/s
Shared memory -
DirectX DirectX 11, Shader 5.0
Shader Model 6.3
OpenGL 4.5
OpenCL 2.0
Vulkan +
Monero / XMR (CryptoNight) 0.58 kh/s
FreeSync +
Bus support PCIe 3.0
HDMI +
Laptop size large
Eyefinity +
HD3D +
PowerTune +
TrueAudio +
ZeroCore +
Mantle +
Design reference
Bridgeless CrossFire +
Number of Eyefinity displays 6
DisplayPort support +
CrossFire +
VCE +
DDMA audio +
Decred / DCR (Decred) 0.89 Gh/s
Ethereum / ETH (DaggerHashimoto) 20.63 Mh/s
Zcash / ZEC (Equihash) 175 Sol/s
Compute units 32
Form factor full height / full length
High bandwidth memory (HBM) -
LiquidVR +
FRTC +
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