Radeon HD 7990 vs Radeon RX 460

If you are going to buy a new graphics card and are choosing between Radeon HD 7990 and Radeon RX 460, 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 7990 stacks up against Radeon RX 460, check out specs charts below.

Main Specs

  Radeon HD 7990 Radeon RX 460
Power consumption (TDP) 375 Watt 75 Watt
Interface PCIe 3.0 x16 PCIe 3.0 x8
Supplementary power connectors 2x 8-pin None
Memory type GDDR5 GDDR5
Maximum RAM amount 3 GB 4 GB
Display Connectors 1x DVI, 4x mini-DisplayPort 1x DVI, 1x HDMI, 1x DisplayPort
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  • Radeon HD 7990 has 400% more power consumption, than Radeon RX 460.
  • Radeon HD 7990 is connected by PCIe 3.0 x16, and Radeon RX 460 uses PCIe 3.0 x8 interface.
  • Radeon RX 460 has 1 GB more memory, than Radeon HD 7990.
  • Both cards are used in Desktops.
  • Radeon HD 7990 is build with GCN 1.0 architecture, and Radeon RX 460 - with Polaris.
  • Core clock speed of Radeon RX 460 is 140 MHz higher, than Radeon HD 7990.
  • Radeon HD 7990 is manufactured by 28 nm process technology, and Radeon RX 460 - by 14 nm process technology.
  • Radeon HD 7990 is 137 mm longer, than Radeon RX 460.
  • Memory clock speed of Radeon RX 460 is 1000 MHz higher, than Radeon HD 7990.

Game benchmarks

high / 1080p 35−40 21−24
ultra / 1080p 21−24 12−14
QHD / 1440p 16−18 7−8
4K / 2160p 10−11 5−6
low / 720p 60−65 40−45
medium / 1080p 40−45 24−27
The average gaming FPS of Radeon HD 7990 in Assassin's Creed Odyssey is 68% more, than Radeon RX 460.

Full Specs

  Radeon HD 7990 Radeon RX 460
Architecture GCN 1.0 Polaris
Code name Malta Polaris 11 / Baffin XT
Type Desktop Desktop
Release date 24 April 2013 8 August 2016
Pipelines 2048 896
Core clock speed 950 MHz 1090 MHz
Boost Clock 1000 MHz 1200 MHz
Transistor count 4,313 million 3,000 million
Manufacturing process technology 28 nm 14 nm
Texture fill rate 128.0 67.20
Floating-point performance 2x 4,096 gflops 2,150 gflops
Length 307 mm 170 mm
Memory bus width 384 Bit 128 Bit
Memory clock speed 6000 MHz 7000 MHz
Memory bandwidth 288.0 GB/s 112.0 GB/s
Shared memory -
DirectX 12 (11_1) 12 (12_0)
Shader Model 5.1 6.4
OpenGL 4.6 4.6
OpenCL 1.2 2.0
Vulkan 1.2.131 1.2.131
FreeSync +
Bitcoin / BTC (SHA256) 459 Mh/s 240 Mh/s
Ethereum / ETH (DaggerHashimoto) 44 Mh/s
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