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Radeon HD 5970 vs Radeon HD 7850

Intro

The Radeon HD 5970 uses a 40 nm design. AMD has clocked the core speed at 725 MHz. The GDDR5 memory runs at a speed of 1000 MHz on this particular card. It features 1600 SPUs as well as 160 Texture Address Units and 64 ROPs.

Compare those specifications to the Radeon HD 7850, which features GPU core speed of 860 MHz, and 2048 MB of GDDR5 RAM set to run at 1200 MHz through a 256-bit bus. It also is comprised of 1024 Stream Processors, 64 TAUs, 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

The Radeon HD 5970 should theoretically perform quite a bit faster than the Radeon HD 7850 in general. (explain)

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

Texel Rate

The Radeon HD 5970 will be quite a bit (approximately 322%) more effective 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 (about 237%) more effective at anti-aliasing than the Radeon HD 7850, and will be able to handle higher 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

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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 largest amount of data (measured in megabytes per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the 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 amount of pixels that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum 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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