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Radeon HD 5970 vs Radeon HD 6990

Intro

The Radeon HD 5970 makes use of a 40 nm design. AMD has clocked the core speed at 725 MHz. The GDDR5 RAM works at a speed of 1000 MHz on this specific model. It features 1600 SPUs along with 160 Texture Address Units and 64 ROPs.

Compare that to the Radeon HD 6990, which comes with GPU core speed of 830 MHz, and 2048 MB of GDDR5 RAM set to run at 1250 MHz through a 256-bit bus. It also features 1536 Stream Processors, 96 Texture Address Units, and 32 Raster Operation Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5970 294 Watts
Radeon HD 6990 375 Watts
Difference: 81 Watts (28%)

Memory Bandwidth

Performance-wise, the Radeon HD 6990 should in theory be quite a bit better than the Radeon HD 5970 in general. (explain)

Radeon HD 6990 320000 MB/sec
Radeon HD 5970 256000 MB/sec
Difference: 64000 (25%)

Texel Rate

The Radeon HD 5970 is much (about 46%) faster with regards to anisotropic filtering than the Radeon HD 6990. (explain)

Radeon HD 5970 232000 Mtexels/sec
Radeon HD 6990 159360 Mtexels/sec
Difference: 72640 (46%)

Pixel Rate

The Radeon HD 5970 will be a lot (about 75%) better at AA than the Radeon HD 6990, and should be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon HD 5970 92800 Mpixels/sec
Radeon HD 6990 53120 Mpixels/sec
Difference: 39680 (75%)

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

Radeon HD 5970

Amazon.com

Radeon HD 6990

Amazon.com

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

Model Radeon HD 5970 Radeon HD 6990
Manufacturer AMD AMD
Year November 2009 March 2011
Code Name Hemlock XT Antilles
Fab Process 40 nm 40 nm
Bus PCIe x16 PCIe 2.1 x16
Memory 1024 MB (x2) 2048 MB (x2)
Core Speed 725 MHz (x2) 830 MHz (x2)
Shader Speed N/A MHz (x2) (N/A) MHz (x2)
Memory Speed 1000 MHz (4000 MHz effective) (x2) 1250 MHz (5000 MHz effective) (x2)
Unified Shaders 1600 (x2) 1536 (x2)
Texture Mapping Units 160 (x2) 96 (x2)
Render Output Units 64 (x2) 32 (x2)
Bus Type GDDR5 GDDR5
Bus Width 256-bit (x2) 256-bit (x2)
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1
Power (Max TDP) 294 watts 375 watts
Shader Model 5.0 5.0
Bandwidth 256000 MB/sec 320000 MB/sec
Texel Rate 232000 Mtexels/sec 159360 Mtexels/sec
Pixel Rate 92800 Mpixels/sec 53120 Mpixels/sec

Memory Bandwidth: Bandwidth is the max amount of information (in units of megabytes per second) that can be transported over the external memory interface within a second. It's calculated by multiplying the interface width by the speed of its memory. In the case of DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better 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 are applied in one second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher this number, 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 most pixels that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount 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 filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Comments

8 Responses to “Radeon HD 5970 vs Radeon HD 6990”
Robert says:
This is wrong! The 6990 has 192 texture units and the 5970 has 160 texture units. They have the same amount of render output units or ROPs.
[...] lesser)but it kill the 6990 in Texel Rate and Pixel Rate for better understanding have a look at Radeon HD 5970 vs Radeon HD 6990 – Performance Comparison Benchmarks @ Hardware Compare 6850 is also a pretty decent card i guess go on with [...]
magbul says:
ATI Radeon HD 5970 Graphics card is recently announced and expected to be the world’s fastest Graphic card is it right.or fake.i saw the comparison between gtx 590 vs radeon hd 5970 and 5970 vs 6990.
it kill the 6990 n gtx 590 in Texel Rate and Pixel Rate.plz reply..because i want to buy that graphic card
emel says:
Robert you dumb check the official AMD site for details !!!
Dr.Hawk says:
Radeon HD 5970 It is considered a V8 engine!
[...] Pixel rate) using a single pci-e slot, regardless if single or dual gpu card.. 5970 > 6990 = Radeon HD 5970 vs Radeon HD 6990 – Performance Comparison Benchmarks @ Hardware Compare 5970 > GTX580 3gb MARS II = GeForce GTX 580 3GB vs Radeon HD 5970 – Performance Comparison [...]
[...] Radeon HD 5970 vs Radeon HD 6990 – Performance Comparison Benchmarks @ Hardware Compare بدون شرح .... پاسخ با نقل قول « [...]
LOL says:
WHERE ATI5970 4GB ?

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