Radeon HD 7970 vs Radeon HD 7990

When comparing Radeon HD 7970 and Radeon HD 7990, 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 7970 and Radeon HD 7990 is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.

Main Specs

  Radeon HD 7970 Radeon HD 7990
Power consumption (TDP) 300 Watt 375 Watt
Interface PCIe 3.0 x16 PCIe 3.0 x16
Supplementary power connectors 1x 6-pin + 1x 8-pin 2x 8-pin
Memory type GDDR5 GDDR5
Maximum RAM amount 3 GB 3 GB
Display Connectors 1x DVI, 1x HDMI, 2x mini-DisplayPort 1x DVI, 4x mini-DisplayPort
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  • Radeon HD 7990 has 25% more power consumption, than Radeon HD 7970.
  • Both video cards are using PCIe 3.0 x16 interface connection to a motherboard.
  • Radeon HD 7970 and Radeon HD 7990 have maximum RAM of 3 GB.
  • Both cards are used in Desktops.
  • Radeon HD 7970 is build with GCN architecture, and Radeon HD 7990 - with GCN 1.0.
  • Radeon HD 7970 and Radeon HD 7990 are manufactured by 28 nm process technology.
  • Radeon HD 7990 is 33 mm longer, than Radeon HD 7970.
  • Memory clock speed of Radeon HD 7990 is 4625 MHz higher, than Radeon HD 7970.

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 7970 and Radeon HD 7990 have the same average FPS in Assassin's Creed Odyssey.

Full Specs

  Radeon HD 7970 Radeon HD 7990
Architecture GCN GCN 1.0
Code name Tahiti XT Malta
Type Desktop Desktop
Release date 22 December 2011 24 April 2013
Pipelines 2048 2048
Core clock speed 950 MHz
Boost Clock 925 MHz 1000 MHz
Transistor count 4,313 million 4,313 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 118.4 128.0
Floating-point performance 3,789 gflops 2x 4,096 gflops
Length 274 mm 307 mm
Memory bus width 384 Bit 384 Bit
Memory clock speed 1375 MHz 6000 MHz
Memory bandwidth 264 GB/s 288.0 GB/s
Shared memory -
DirectX 12 (11_1)
Shader Model 5.1 5.1
OpenGL 4.6 4.6
OpenCL 1.2 1.2
Vulkan 1.2.131
FreeSync +
Bus support PCIe 2.1 x16
HDMI +
Bitcoin / BTC (SHA256) 485 Mh/s 459 Mh/s
Eyefinity +
Design reference
CrossFire +
Ethereum / ETH (DaggerHashimoto) 20.71 Mh/s 44 Mh/s
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