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Radeon HD 5970 vs Radeon HD 6990

Intro

The Radeon HD 5970 comes with a core clock speed of 725 MHz and a GDDR5 memory frequency of 1000 MHz. It also makes use of a 256-bit bus, and makes use of a 40 nm design. It is made up of 1600 SPUs, 160 TAUs, and 64 ROPs.

Compare that to the Radeon HD 6990, which comes with core clock speeds of 830 MHz on the GPU, and 1250 MHz on the 2048 MB of GDDR5 memory. It features 1536 SPUs along with 96 TAUs and 32 ROPs.

(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

In theory, the Radeon HD 6990 should be much faster than the Radeon HD 5970 overall. (explain)

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

Texel Rate

The Radeon HD 5970 should be a lot (approximately 46%) faster with regards to AF than the Radeon HD 6990. (explain)

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

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 5970 is the winner, by a large margin. (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

Please note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page. We have no control over the accuracy of their search results.

Radeon HD 5970

Amazon.com

Other US-based stores

Radeon HD 6990

Amazon.com

Other US-based stores

Specifications

Model Radeon HD 5970 Radeon HD 6990
Manufacturer ATi ATi
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 largest amount of information (in units of MB per second) that can be moved past the external memory interface in one second. It's worked out by multiplying the bus 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 4 instead. The higher the bandwidth is, the better 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 can be processed in one second. This number is calculated by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the video 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 amount of pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum 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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