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Radeon HD 5970 vs Radeon R9 270

Intro

The Radeon HD 5970 has a GPU core clock speed of 725 MHz, and the 1024 MB of GDDR5 RAM runs at 1000 MHz through a 256-bit bus. It also is comprised of 1600 SPUs, 160 TAUs, and 64 ROPs.

Compare that to the Radeon R9 270, which features a GPU core clock speed of 900 MHz, and 2048 MB of GDDR5 memory running at 1400 MHz through a 256-bit bus. It also is made up of 1280 Stream Processors, 80 TAUs, and 32 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 270 150 Watts
Radeon HD 5970 294 Watts
Difference: 144 Watts (96%)

Memory Bandwidth

Performance-wise, the Radeon HD 5970 should theoretically be much better than the Radeon R9 270 overall. (explain)

Radeon HD 5970 256000 MB/sec
Radeon R9 270 179200 MB/sec
Difference: 76800 (43%)

Texel Rate

The Radeon HD 5970 should be much (approximately 222%) more effective at anisotropic filtering than the Radeon R9 270. (explain)

Radeon HD 5970 232000 Mtexels/sec
Radeon R9 270 72000 Mtexels/sec
Difference: 160000 (222%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 5970 is superior to the Radeon R9 270, by a large margin. (explain)

Radeon HD 5970 92800 Mpixels/sec
Radeon R9 270 28800 Mpixels/sec
Difference: 64000 (222%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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Radeon HD 5970

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.

Specifications

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Model Radeon HD 5970 Radeon R9 270
Manufacturer AMD AMD
Year November 2009 November 2013
Code Name Hemlock XT Curacao Pro
Memory 1024 MB (x2) 2048 MB
Core Speed 725 MHz (x2) 900 MHz
Memory Speed 4000 MHz (x2) 5600 MHz
Power (Max TDP) 294 watts 150 watts
Bandwidth 256000 MB/sec 179200 MB/sec
Texel Rate 232000 Mtexels/sec 72000 Mtexels/sec
Pixel Rate 92800 Mpixels/sec 28800 Mpixels/sec
Unified Shaders 1600 (x2) 1280
Texture Mapping Units 160 (x2) 80
Render Output Units 64 (x2) 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit (x2) 256-bit
Fab Process 40 nm 28 nm
Transistors 2154 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: Memory bandwidth is the maximum amount of information (in units of MB per second) that can be transported past the external memory interface within a second. The number is calculated by multiplying the bus width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory in one 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 - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

Radeon HD 5970

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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