Radeon HD 6990 vs Radeon Pro Duo

Find out if it is worth upgrading your current GPU setup by comparing Radeon HD 6990 and Radeon Pro Duo. 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 Pro Duo. 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 Pro Duo
Power consumption (TDP) 375 Watt 350 Watt
Interface PCIe 2.0 x16 PCIe 3.0 x16
Supplementary power connectors 2x 8-pin 3x 8-pin
Memory type GDDR5 High Bandwidth Memory (HBM)
Maximum RAM amount 2 GB 8 GB
Display Connectors 1x DVI, 4x mini-DisplayPort 1x HDMI, 3x DisplayPort
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  • Radeon HD 6990 has 7% more power consumption, than Radeon Pro Duo.
  • Radeon HD 6990 is connected by PCIe 2.0 x16, and Radeon Pro Duo uses PCIe 3.0 x16 interface.
  • Radeon Pro Duo has 6 GB more memory, than Radeon HD 6990.
  • Both cards are used in Desktops.
  • Radeon HD 6990 is build with TeraScale 3 architecture, and Radeon Pro Duo - with GCN 3.0.
  • Radeon HD 6990 is manufactured by 40 nm process technology, and Radeon Pro Duo - by 28 nm process technology.
  • Radeon HD 6990 is 18 mm longer, than Radeon Pro Duo.
  • Memory clock speed of Radeon HD 6990 is 4500 MHz higher, than Radeon Pro Duo.

Game benchmarks

high / 1080p 14−16 50−55
ultra / 1080p 9−10 30−35
QHD / 1440p 3−4 27−30
4K / 2160p 14−16
low / 720p 30−35 75−80
medium / 1080p 18−20 60−65
The average gaming FPS of Radeon Pro Duo in Assassin's Creed Odyssey is 233% more, than Radeon HD 6990.

Full Specs

  Radeon HD 6990 Radeon Pro Duo
Architecture TeraScale 3 GCN 3.0
Code name Antilles Capsaicin
Type Desktop Workstation
Release date 8 March 2011 26 April 2016
Pipelines 1536 4096
Core clock speed 830 MHz
Boost Clock 1000 MHz
Transistor count 2,640 million 8,900 million
Manufacturing process technology 40 nm 28 nm
Texture fill rate 79.68 256.0
Floating-point performance 2x 2,549.8 gflops 2x 8,192 gflops
Length 295 mm 277 mm
Memory bus width 256 Bit 4096 Bit
Memory clock speed 5000 MHz 500 MHz
Memory bandwidth 160.0 GB/s 512 GB/s
DirectX 11.2 (11_0)
Shader Model 5.0 6.0
OpenGL 4.4 4.5
OpenCL 1.2 2.0
Vulkan N/A +
FreeSync +
Bus support PCIe 3.0
HDMI +
Bitcoin / BTC (SHA256) 265 Mh/s 809 Mh/s
Eyefinity +
HD3D +
PowerTune +
TrueAudio +
ZeroCore +
Mantle +
Design reference
Number of Eyefinity displays 6
DisplayPort support +
CrossFire +
VCE +
Ethereum / ETH (DaggerHashimoto) 24 Mh/s
Compute units 128
AppAcceleration +
LiquidVR +
TressFX +
UVD +
Enduro +
FRTC +
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