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Radeon HD 6990 vs Radeon HD 7970


The Radeon HD 6990 comes with a GPU core speed of 830 MHz, and the 2048 MB of GDDR5 memory runs at 1250 MHz through a 256-bit bus. It also is made up of 1536 Stream Processors, 96 TAUs, and 32 Raster Operation Units.

Compare that to the Radeon HD 7970, which comes with core speeds of 925 MHz on the GPU, and 1375 MHz on the 3072 MB of GDDR5 memory. It features 2048 SPUs as well as 128 TAUs and 32 Rasterization Operator Units.

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These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon HD 7970 8225 points
Radeon HD 6990 5820 points
Difference: 2405 (41%)

Ethereum Mining Hash Rate

Radeon HD 6990 24 Mh/s
Radeon HD 7970 21 Mh/s
Difference: 3 (14%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7970 250 Watts
Radeon HD 6990 375 Watts
Difference: 125 Watts (50%)

Memory Bandwidth

Performance-wise, the Radeon HD 6990 should in theory be much superior to the Radeon HD 7970 in general. (explain)

Radeon HD 6990 320000 MB/sec
Radeon HD 7970 264000 MB/sec
Difference: 56000 (21%)

Texel Rate

The Radeon HD 6990 should be a lot (about 35%) faster with regards to AF than the Radeon HD 7970. (explain)

Radeon HD 6990 159360 Mtexels/sec
Radeon HD 7970 118400 Mtexels/sec
Difference: 40960 (35%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 6990 is a better choice, by far. (explain)

Radeon HD 6990 53120 Mpixels/sec
Radeon HD 7970 29600 Mpixels/sec
Difference: 23520 (79%)

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 6990

Radeon HD 7970

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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Model Radeon HD 6990 Radeon HD 7970
Manufacturer AMD AMD
Year March 2011 January 2012
Code Name Antilles Tahiti XT
Memory 2048 MB (x2) 3072 MB
Core Speed 830 MHz (x2) 925 MHz
Memory Speed 5000 MHz (x2) 5500 MHz
Power (Max TDP) 375 watts 250 watts
Bandwidth 320000 MB/sec 264000 MB/sec
Texel Rate 159360 Mtexels/sec 118400 Mtexels/sec
Pixel Rate 53120 Mpixels/sec 29600 Mpixels/sec
Unified Shaders 1536 (x2) 2048
Texture Mapping Units 96 (x2) 128
Render Output Units 32 (x2) 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit (x2) 384-bit
Fab Process 40 nm 28 nm
Transistors 2640 million 4313 million
Bus PCIe 2.1 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 max amount of data (measured in megabytes per second) that can be transported past the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs 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 fill rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

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Radeon HD 6990

Radeon HD 7970

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.


8 Responses to “Radeon HD 6990 vs Radeon HD 7970”
SuperKewldude says:

LOL and i was just about to buy a 7970! imma going for a 6990

dgbsf says:

Is Superkewldude retarded?

Lol says:

Dont just look at performance look at the power consumtion too :l

teehee says:

OMG how about 6990 in crossfire!


chuck says:

if you look at the specs, really effective bandwidth would be better on the 7970 because of the PCIe 3.0 (providing you have a PCIe 3.0 compatible board) and it has better open GL 4.2 admittedly its only .1 better but thats the difference between playing BRINK and not playing BRINK.or any other game. and note too that the 6990 here has 2 cores where as the 7970 has one.

Consulta 6950+6970 says:

[...] que el Crossfire, porque con algunos juegos empeora el rendimiento. Para que te hagas idea: Radeon HD 6990 vs Radeon HD 7970 – Performance Comparison Benchmarks @ Hardware Compare Radeon HD 6950 vs Radeon HD 6990 – Performance Comparison Benchmarks @ Hardware Compare aqui [...]

gamers says:

i think, we should waiting for 7990 😀 more fantastic than above.

cheapassgamers says:

I think, we should know that the 7990 🙂 will be expensive as FUUUUUUUUUUUUUUUUUUUUUUUU

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