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Radeon HD 6970 vs Radeon R9 270

Intro

The Radeon HD 6970 uses a 40 nm design. AMD has clocked the core frequency at 880 MHz. The GDDR5 memory works at a speed of 1375 MHz on this model. It features 1536 SPUs as well as 96 Texture Address Units and 32 ROPs.

Compare that to the Radeon R9 270, which comes with a core clock speed of 900 MHz and a GDDR5 memory speed of 1400 MHz. It also uses a 256-bit memory bus, and makes use of a 28 nm design. It is comprised of 1280 SPUs, 80 TAUs, 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 270 5943 points
Radeon HD 6970 3470 points
Difference: 2473 (71%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 270 150 Watts
Radeon HD 6970 250 Watts
Difference: 100 Watts (67%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 270 is 2% quicker than the Radeon HD 6970 overall, because of its higher data rate. (explain)

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

Texel Rate

The Radeon HD 6970 should be a bit (more or less 17%) faster with regards to texture filtering than the Radeon R9 270. (explain)

Radeon HD 6970 84480 Mtexels/sec
Radeon R9 270 72000 Mtexels/sec
Difference: 12480 (17%)

Pixel Rate

The Radeon R9 270 is a little bit (about 2%) more effective at full screen anti-aliasing than the Radeon HD 6970, and able to handle higher resolutions without losing too much performance. (explain)

Radeon R9 270 28800 Mpixels/sec
Radeon HD 6970 28160 Mpixels/sec
Difference: 640 (2%)

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

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Radeon R9 270

Amazon.com

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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 270
Manufacturer AMD AMD
Year December 2010 November 2013
Code Name Cayman XT Curacao Pro
Memory 2048 MB 2048 MB
Core Speed 880 MHz 900 MHz
Memory Speed 5500 MHz 5600 MHz
Power (Max TDP) 250 watts 150 watts
Bandwidth 176000 MB/sec 179200 MB/sec
Texel Rate 84480 Mtexels/sec 72000 Mtexels/sec
Pixel Rate 28160 Mpixels/sec 28800 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 max amount of data (in units of megabytes per second) that can be transferred over the external memory interface in one second. It is worked out by multiplying the bus width by the speed of its memory. If the card has DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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Radeon HD 6970

Amazon.com

Check prices at:

Radeon R9 270

Amazon.com

Check prices at:

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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