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Radeon HD 5970 vs Radeon HD 7850

Intro

The Radeon HD 5970 has clock speeds of 725 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 RAM. It features 1600 SPUs along with 160 Texture Address Units and 64 Rasterization Operator Units.

Compare all of that to the Radeon HD 7850, which comes with a core clock frequency of 860 MHz and a GDDR5 memory speed of 1200 MHz. It also uses a 256-bit bus, and uses a 28 nm design. It features 1024 SPUs, 64 Texture Address Units, and 32 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7850 130 Watts
Radeon HD 5970 294 Watts
Difference: 164 Watts (126%)

Memory Bandwidth

As far as performance goes, the Radeon HD 5970 should theoretically be quite a bit better than the Radeon HD 7850 overall. (explain)

Radeon HD 5970 256000 MB/sec
Radeon HD 7850 153600 MB/sec
Difference: 102400 (67%)

Texel Rate

The Radeon HD 5970 should be much (approximately 322%) better at anisotropic filtering than the Radeon HD 7850. (explain)

Radeon HD 5970 232000 Mtexels/sec
Radeon HD 7850 55040 Mtexels/sec
Difference: 176960 (322%)

Pixel Rate

The Radeon HD 5970 is much (approximately 237%) faster with regards to full screen anti-aliasing than the Radeon HD 7850, and should be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon HD 5970 92800 Mpixels/sec
Radeon HD 7850 27520 Mpixels/sec
Difference: 65280 (237%)

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 HD 7850

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 HD 7850
Manufacturer AMD AMD
Year November 2009 March 2012
Code Name Hemlock XT Pitcairn Pro
Memory 1024 MB (x2) 2048 MB
Core Speed 725 MHz (x2) 860 MHz
Memory Speed 4000 MHz (x2) 4800 MHz
Power (Max TDP) 294 watts 130 watts
Bandwidth 256000 MB/sec 153600 MB/sec
Texel Rate 232000 Mtexels/sec 55040 Mtexels/sec
Pixel Rate 92800 Mpixels/sec 27520 Mpixels/sec
Unified Shaders 1600 (x2) 1024
Texture Mapping Units 160 (x2) 64
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 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.2

Memory Bandwidth: Bandwidth is the max amount of information (counted in megabytes per second) that can be moved past the external memory interface within a second. It is worked out by multiplying the interface width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The number 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 is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

Radeon HD 5970

Amazon.com

Check prices at:

Radeon HD 7850

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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