Radeon HD 6990 vs Radeon RX 460

If you are going to buy a new graphics card and are choosing between Radeon HD 6990 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 6990 stacks up against Radeon RX 460, check out specs charts below.

Main Specs

  Radeon HD 6990 Radeon RX 460
Power consumption (TDP) 375 Watt 75 Watt
Interface PCIe 2.0 x16 PCIe 3.0 x8
Supplementary power connectors 2x 8-pin None
Memory type GDDR5 GDDR5
Maximum RAM amount 2 GB 4 GB
Display Connectors 1x DVI, 4x mini-DisplayPort 1x DVI, 1x HDMI, 1x DisplayPort
  Check Price Check Price
  • Radeon HD 6990 has 400% more power consumption, than Radeon RX 460.
  • Radeon HD 6990 is connected by PCIe 2.0 x16, and Radeon RX 460 uses PCIe 3.0 x8 interface.
  • Radeon RX 460 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 RX 460 - with Polaris.
  • Core clock speed of Radeon RX 460 is 260 MHz higher, than Radeon HD 6990.
  • Radeon HD 6990 is manufactured by 40 nm process technology, and Radeon RX 460 - by 14 nm process technology.
  • Radeon HD 6990 is 125 mm longer, than Radeon RX 460.
  • Memory clock speed of Radeon RX 460 is 2000 MHz higher, than Radeon HD 6990.

Game benchmarks

high / 1080p 14−16 21−24
ultra / 1080p 9−10 12−14
QHD / 1440p 3−4 7−8
4K / 2160p 5−6
low / 720p 30−35 40−45
medium / 1080p 18−20 24−27
The average gaming FPS of Radeon RX 460 in Assassin's Creed Odyssey is 46% more, than Radeon HD 6990.

Full Specs

  Radeon HD 6990 Radeon RX 460
Architecture TeraScale 3 Polaris
Code name Antilles Polaris 11 / Baffin XT
Type Desktop Desktop
Release date 8 March 2011 8 August 2016
Pipelines 1536 896
Core clock speed 830 MHz 1090 MHz
Boost Clock 1200 MHz
Transistor count 2,640 million 3,000 million
Manufacturing process technology 40 nm 14 nm
Texture fill rate 79.68 67.20
Floating-point performance 2x 2,549.8 gflops 2,150 gflops
Length 295 mm 170 mm
Memory bus width 256 Bit 128 Bit
Memory clock speed 5000 MHz 7000 MHz
Memory bandwidth 160.0 GB/s 112.0 GB/s
Shared memory -
DirectX 11.2 (11_0) 12 (12_0)
Shader Model 5.0 6.4
OpenGL 4.4 4.6
OpenCL 1.2 2.0
Vulkan N/A 1.2.131
FreeSync +
Bitcoin / BTC (SHA256) 265 Mh/s 240 Mh/s
Ethereum / ETH (DaggerHashimoto) 24 Mh/s
  Check Price Check Price