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Radeon HD 5970 vs Radeon HD 7950 3GB

Intro

The Radeon HD 5970 makes use of a 40 nm design. AMD has set the core frequency at 725 MHz. The GDDR5 RAM works at a speed of 1000 MHz on this specific card. It features 1600 SPUs along with 160 TAUs and 64 Rasterization Operator Units.

Compare those specifications to the Radeon HD 7950 3GB, which makes use of a 28 nm design. AMD has set the core frequency at 800 MHz. The GDDR5 RAM works at a speed of 1250 MHz on this particular card. It features 1792 SPUs as well as 112 Texture Address Units and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7950 3GB 200 Watts
Radeon HD 5970 294 Watts
Difference: 94 Watts (47%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 5970 should perform a small bit faster than the Radeon HD 7950 3GB overall. (explain)

Radeon HD 5970 256000 MB/sec
Radeon HD 7950 3GB 240000 MB/sec
Difference: 16000 (7%)

Texel Rate

The Radeon HD 5970 is a lot (about 159%) faster with regards to anisotropic filtering than the Radeon HD 7950 3GB. (explain)

Radeon HD 5970 232000 Mtexels/sec
Radeon HD 7950 3GB 89600 Mtexels/sec
Difference: 142400 (159%)

Pixel Rate

The Radeon HD 5970 will be much (more or less 263%) better at FSAA than the Radeon HD 7950 3GB, and should be able to handle higher resolutions better. (explain)

Radeon HD 5970 92800 Mpixels/sec
Radeon HD 7950 3GB 25600 Mpixels/sec
Difference: 67200 (263%)

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 7950 3GB

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 7950 3GB
Manufacturer AMD AMD
Year November 2009 January 2012
Code Name Hemlock XT Tahiti Pro
Memory 1024 MB (x2) 3072 MB
Core Speed 725 MHz (x2) 800 MHz
Memory Speed 4000 MHz (x2) 5000 MHz
Power (Max TDP) 294 watts 200 watts
Bandwidth 256000 MB/sec 240000 MB/sec
Texel Rate 232000 Mtexels/sec 89600 Mtexels/sec
Pixel Rate 92800 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 1600 (x2) 1792
Texture Mapping Units 160 (x2) 112
Render Output Units 64 (x2) 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit (x2) 384-bit
Fab Process 40 nm 28 nm
Transistors 2154 million 4313 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 (measured in MB per second) that can be moved across 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, 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 AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory 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 HD 7950 3GB

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.

Comments

One Response to “Radeon HD 5970 vs Radeon HD 7950 3GB”
Cam says:

Flawed, because the HD 5970 does not have 320 TMUs and 128 ROPs, only 160 TMUs and 64 Rops.

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