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Radeon HD 5970 vs Radeon HD 7850

Intro

The Radeon HD 5970 has core speeds of 725 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 memory. It features 1600 SPUs as well as 160 Texture Address Units and 64 ROPs.

Compare those specs to the Radeon HD 7850, which makes use of a 28 nm design. AMD has clocked the core frequency at 860 MHz. The GDDR5 RAM works at a speed of 1200 MHz on this card. It features 1024 SPUs as well as 64 TAUs and 32 Rasterization Operator 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 much superior to 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 a lot (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 will be a lot (approximately 237%) better at full screen anti-aliasing than the Radeon HD 7850, and also should be able to handle higher resolutions while still performing well. (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: Memory bandwidth is the maximum amount of data (measured in megabytes per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability 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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