Radeon HD 6790 vs Radeon R9 270X

If you are going to buy a new graphics card and are choosing between Radeon HD 6790 and Radeon R9 270X, 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 6790 stacks up against Radeon R9 270X, check out specs charts below.

Main Specs

  Radeon HD 6790 Radeon R9 270X
Power consumption (TDP) 150 Watt 180 Watt
Interface PCIe 2.0 x16 PCIe 3.0 x16
Supplementary power connectors 2x 6-pin 2 x 6-pin
Memory type GDDR5 GDDR5
Maximum RAM amount 1 GB 2 GB
Display Connectors 2x DVI, 1x HDMI, 1x DisplayPort 2x DVI, 1x HDMI, 1x DisplayPort
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  • Radeon R9 270X has 20% more power consumption, than Radeon HD 6790.
  • Radeon HD 6790 is connected by PCIe 2.0 x16, and Radeon R9 270X uses PCIe 3.0 x16 interface.
  • Radeon R9 270X has 1 GB more memory, than Radeon HD 6790.
  • Both cards are used in Desktops.
  • Radeon HD 6790 is build with Terascale 2 architecture, and Radeon R9 270X - with GCN.
  • Radeon HD 6790 is manufactured by 40 nm process technology, and Radeon R9 270X - by 28 nm process technology.

Game benchmarks

high / 1080p 7−8 24−27
ultra / 1080p 4−5 14−16
QHD / 1440p 0−1 10−11
4K / 2160p 6−7
low / 720p 18−20 45−50
medium / 1080p 9−10 30−35
The average gaming FPS of Radeon R9 270X in Assassin's Creed Odyssey is 200% more, than Radeon HD 6790.

Full Specs

  Radeon HD 6790 Radeon R9 270X
Architecture Terascale 2 GCN
Code name Barts Curacao XT
Type Desktop Desktop
Release date 4 April 2011 8 October 2013
Pipelines 800 1280
Core clock speed 840 MHz
Boost Clock 1050 MHz
Transistor count 1,700 million 2,800 million
Manufacturing process technology 40 nm 28 nm
Texture fill rate 33.60 84.00
Floating-point performance 1,344.0 gflops 2,688 gflops
Length 198 mm
Memory bus width 256 Bit 256 Bit
Memory clock speed 1050 MHz
Memory bandwidth 134.4 GB/s 179.2 GB/s
Shared memory -
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 3.0
HDMI +
Bitcoin / BTC (SHA256) 122 Mh/s 318 Mh/s
Eyefinity +
HD3D +
TrueAudio +
Design reference
DisplayPort support +
CrossFire +
DDMA audio +
Ethereum / ETH (DaggerHashimoto) 30 Mh/s
Zcash / ZEC (Equihash) 163 Sol/s
AppAcceleration +
LiquidVR +
TressFX +
UVD +
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