Radeon HD 6990 vs Radeon HD 7850

When comparing Radeon HD 6990 and Radeon HD 7850, 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 6990 and Radeon HD 7850 is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.

Main Specs

  Radeon HD 6990 Radeon HD 7850
Power consumption (TDP) 375 Watt 225 Watt
Interface PCIe 2.0 x16 PCIe 3.0 x16
Supplementary power connectors 2x 8-pin 1x 6-pin
Memory type GDDR5 GDDR5
Maximum RAM amount 2 GB 2 GB
Display Connectors 1x DVI, 4x mini-DisplayPort 1x DVI, 1x HDMI, 2x mini-DisplayPort
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  • Radeon HD 6990 has 66% more power consumption, than Radeon HD 7850.
  • Radeon HD 6990 is connected by PCIe 2.0 x16, and Radeon HD 7850 uses PCIe 3.0 x16 interface.
  • Radeon HD 6990 and Radeon HD 7850 have maximum RAM of 2 GB.
  • Both cards are used in Desktops.
  • Radeon HD 6990 is build with TeraScale 3 architecture, and Radeon HD 7850 - with GCN 1.0.
  • Radeon HD 6990 is manufactured by 40 nm process technology, and Radeon HD 7850 - by 28 nm process technology.
  • Radeon HD 6990 is 85 mm longer, than Radeon HD 7850.
  • Memory clock speed of Radeon HD 6990 is 3800 MHz higher, than Radeon HD 7850.

Game benchmarks

high / 1080p 14−16 18−20
ultra / 1080p 9−10 10−12
QHD / 1440p 3−4 5−6
4K / 2160p 4−5
low / 720p 30−35 35−40
medium / 1080p 18−20 24−27
The average gaming FPS of Radeon HD 7850 in Assassin's Creed Odyssey is 26% more, than Radeon HD 6990.

Full Specs

  Radeon HD 6990 Radeon HD 7850
Architecture TeraScale 3 GCN 1.0
Code name Antilles Pitcairn
Type Desktop Desktop
Release date 8 March 2011 5 March 2012
Pipelines 1536 1024
Core clock speed 830 MHz
Boost Clock 1000 MHz
Transistor count 2,640 million 2,800 million
Manufacturing process technology 40 nm 28 nm
Texture fill rate 79.68 55.04
Floating-point performance 2x 2,549.8 gflops 1,761 gflops
Length 295 mm 210 mm
Memory bus width 256 Bit 256 Bit
Memory clock speed 5000 MHz 1200 MHz
Memory bandwidth 160.0 GB/s 153.6 GB/s
DirectX 11.2 (11_0)
Shader Model 5.0 5.1
OpenGL 4.4 4.6
OpenCL 1.2 1.2
Vulkan N/A
FreeSync +
Bus support PCIe 2.1 x16
HDMI +
Bitcoin / BTC (SHA256) 265 Mh/s 249 Mh/s
Eyefinity +
Design reference
CrossFire +
Ethereum / ETH (DaggerHashimoto) 24 Mh/s 12.5 Mh/s
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