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Radeon HD 6970 vs Radeon R9 270X

Intro

The Radeon HD 6970 has a core clock frequency of 880 MHz and a GDDR5 memory speed of 1375 MHz. It also makes use of a 256-bit bus, and makes use of a 40 nm design. It is made up of 1536 SPUs, 96 Texture Address Units, and 32 ROPs.

Compare that to the Radeon R9 270X, which features a clock frequency of 1000 MHz and a GDDR5 memory speed of 1400 MHz. It also makes use of a 256-bit memory bus, and makes use of a 28 nm design. It is made up of 1280 SPUs, 80 Texture Address Units, and 32 ROPs.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon R9 270X 6590 points
Radeon HD 6970 3470 points
Difference: 3120 (90%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 270X 180 Watts
Radeon HD 6970 250 Watts
Difference: 70 Watts (39%)

Memory Bandwidth

Theoretically, the Radeon R9 270X should perform a bit faster than the Radeon HD 6970 overall. (explain)

Radeon R9 270X 179200 MB/sec
Radeon HD 6970 176000 MB/sec
Difference: 3200 (2%)

Texel Rate

The Radeon HD 6970 will be just a bit (more or less 6%) faster with regards to AF than the Radeon R9 270X. (explain)

Radeon HD 6970 84480 Mtexels/sec
Radeon R9 270X 80000 Mtexels/sec
Difference: 4480 (6%)

Pixel Rate

The Radeon R9 270X should be just a bit (approximately 14%) faster with regards to anti-aliasing than the Radeon HD 6970, and should be able to handle higher resolutions better. (explain)

Radeon R9 270X 32000 Mpixels/sec
Radeon HD 6970 28160 Mpixels/sec
Difference: 3840 (14%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

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Radeon HD 6970

Amazon.com

Radeon R9 270X

Amazon.com

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model Radeon HD 6970 Radeon R9 270X
Manufacturer AMD AMD
Year December 2010 October 2013
Code Name Cayman XT Curacao XT
Memory 2048 MB 2048 MB
Core Speed 880 MHz 1000 MHz
Memory Speed 5500 MHz 5600 MHz
Power (Max TDP) 250 watts 180 watts
Bandwidth 176000 MB/sec 179200 MB/sec
Texel Rate 84480 Mtexels/sec 80000 Mtexels/sec
Pixel Rate 28160 Mpixels/sec 32000 Mpixels/sec
Unified Shaders 1536 1280
Texture Mapping Units 96 80
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 40 nm 28 nm
Transistors 2640 million 2800 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.2
OpenGL Version OpenGL 4.1 OpenGL 4.3

Memory Bandwidth: Bandwidth is the maximum amount of information (in units of MB per second) that can be transferred over the external memory interface within a second. It's worked out by multiplying the interface width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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Radeon HD 6970

Amazon.com

Radeon R9 270X

Amazon.com

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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