Radeon HD 6990 vs Radeon R9 380X

Find out if it is worth upgrading your current GPU setup by comparing Radeon HD 6990 and Radeon R9 380X. 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 6990 and Radeon R9 380X. 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.

Main Specs

  Radeon HD 6990 Radeon R9 380X
Power consumption (TDP) 375 Watt 190 Watt
Interface PCIe 2.0 x16 PCIe 3.0 x16
Supplementary power connectors 2x 8-pin
Memory type GDDR5 GDDR5
Maximum RAM amount 2 GB 4 GB
Display Connectors 1x DVI, 4x mini-DisplayPort 2x DVI, 1x HDMI, 1x DisplayPort
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  • Radeon HD 6990 has 97% more power consumption, than Radeon R9 380X.
  • Radeon HD 6990 is connected by PCIe 2.0 x16, and Radeon R9 380X uses PCIe 3.0 x16 interface.
  • Radeon R9 380X has 2 GB more memory, than Radeon HD 6990.
  • Both cards are used in Desktops.
  • Radeon HD 6990 is build with TeraScale 3 architecture, and Radeon R9 380X - with GCN 3.0.
  • Radeon HD 6990 is manufactured by 40 nm process technology, and Radeon R9 380X - by 28 nm process technology.
  • Radeon HD 6990 is 74 mm longer, than Radeon R9 380X.
  • Memory clock speed of Radeon HD 6990 is 4030 MHz higher, than Radeon R9 380X.

Game benchmarks

high / 1080p 14−16 35−40
ultra / 1080p 9−10 21−24
QHD / 1440p 3−4 16−18
4K / 2160p 10−11
low / 720p 30−35 60−65
medium / 1080p 18−20 40−45
The average gaming FPS of Radeon R9 380X in Assassin's Creed Odyssey is 140% more, than Radeon HD 6990.

Full Specs

  Radeon HD 6990 Radeon R9 380X
Architecture TeraScale 3 GCN 3.0
Code name Antilles Antigua
Type Desktop Desktop
Release date 8 March 2011 19 November 2015
Pipelines 1536 2048
Core clock speed 830 MHz
Boost Clock 970 MHz
Transistor count 2,640 million 5,000 million
Manufacturing process technology 40 nm 28 nm
Texture fill rate 79.68 124.2
Floating-point performance 2x 2,549.8 gflops 3,973 gflops
Length 295 mm 221 mm
Memory bus width 256 Bit 256 Bit
Memory clock speed 5000 MHz 970 MHz
Memory bandwidth 160.0 GB/s 182.4 GB/s
DirectX 11.2 (11_0)
Shader Model 5.0 6.3
OpenGL 4.4 4.5
OpenCL 1.2 2.0
Vulkan N/A +
Monero / XMR (CryptoNight) 0.58 kh/s
FreeSync +
Bus support PCIe 3.0
HDMI +
Bitcoin / BTC (SHA256) 265 Mh/s
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) 24 Mh/s 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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