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GeForce GTX 580 vs Radeon HD 7970

Intro

The GeForce GTX 580 has clock speeds of 772 MHz on the GPU, and 1002 MHz on the 1536 MB of GDDR5 RAM. It features 512 SPUs as well as 64 Texture Address Units and 48 ROPs.

Compare those specs to the Radeon HD 7970, which uses a 28 nm design. AMD has clocked the core speed at 925 MHz. The GDDR5 memory runs at a frequency of 1375 MHz on this specific card. It features 2048 SPUs as well as 128 TAUs and 32 ROPs.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 580 244 Watts
Radeon HD 7970 250 Watts
Difference: 6 Watts (2%)

Memory Bandwidth

Theoretically, the Radeon HD 7970 should be a lot faster than the GeForce GTX 580 in general. (explain)

Radeon HD 7970 264000 MB/sec
GeForce GTX 580 192384 MB/sec
Difference: 71616 (37%)

Texel Rate

The Radeon HD 7970 is much (more or less 140%) more effective at texture filtering than the GeForce GTX 580. (explain)

Radeon HD 7970 118400 Mtexels/sec
GeForce GTX 580 49408 Mtexels/sec
Difference: 68992 (140%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 580 is the winner, by a large margin. (explain)

GeForce GTX 580 37056 Mpixels/sec
Radeon HD 7970 29600 Mpixels/sec
Difference: 7456 (25%)

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.

Price Comparison

GeForce GTX 580

Amazon.com

Radeon HD 7970

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 GeForce GTX 580 Radeon HD 7970
Manufacturer nVidia AMD
Year November 2010 January 2012
Code Name GF110 Tahiti XT
Fab Process 40 nm 28 nm
Bus PCIe x16 PCIe 3.0 x16
Memory 1536 MB 3072 MB
Core Speed 772 MHz 925 MHz
Shader Speed 1544 MHz (N/A) MHz
Memory Speed 1002 MHz (4008 MHz effective) 1375 MHz (5500 MHz effective)
Unified Shaders 512 2048
Texture Mapping Units 64 128
Render Output Units 48 32
Bus Type GDDR5 GDDR5
Bus Width 384-bit 384-bit
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.2
Power (Max TDP) 244 watts 250 watts
Shader Model 5.0 5.0
Bandwidth 192384 MB/sec 264000 MB/sec
Texel Rate 49408 Mtexels/sec 118400 Mtexels/sec
Pixel Rate 37056 Mpixels/sec 29600 Mpixels/sec

Memory Bandwidth: Bandwidth is the largest amount of data (measured in MB per second) that can be transported across the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, 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 per second. This is worked out by multiplying the total texture units of the card 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 applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Comments

3 Responses to “GeForce GTX 580 vs Radeon HD 7970”
kazamajean says:
hmmm it seems hd770 won in memory bus and texel rate but the 580 won the pixel rate, but who is the best among them?
tim says:
yes the 7970 is the winner, because of its 140% win over the 580 in the texel rate :D
Vemri says:
AMD 7970 absolutely more fast than 580, but they still can't handle physx engine in some way they been kicked by Nvidia 2010 card technology.
it depend on your gaming needs and specification.
in this case (hi-end gaming) i am still in the "GREEN" side. they are fast as well.
but for my brothers PC i chose AMD beast gaming machine for the mid-end gaming.

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