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GeForce GTX 580 vs Radeon HD 7750

Intro

The GeForce GTX 580 uses a 40 nm design. nVidia has clocked the core speed at 772 MHz. The GDDR5 RAM is set to run at a speed of 1002 MHz on this specific model. It features 512 SPUs along with 64 TAUs and 48 ROPs.

Compare all that to the Radeon HD 7750, which features a GPU core clock speed of 800 MHz, and 1024 MB of GDDR5 memory set to run at 1125 MHz through a 128-bit bus. It also is made up of 512 Stream Processors, 32 TAUs, and 16 Raster Operation Units.

Display Graphs

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(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750 55 Watts
GeForce GTX 580 244 Watts
Difference: 189 Watts (344%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 580 will be 167% faster than the Radeon HD 7750 in general, due to its greater bandwidth. (explain)

GeForce GTX 580 192384 MB/sec
Radeon HD 7750 72000 MB/sec
Difference: 120384 (167%)

Texel Rate

The GeForce GTX 580 will be a lot (more or less 93%) better at texture filtering than the Radeon HD 7750. (explain)

GeForce GTX 580 49408 Mtexels/sec
Radeon HD 7750 25600 Mtexels/sec
Difference: 23808 (93%)

Pixel Rate

The GeForce GTX 580 will be a lot (more or less 190%) better at full screen anti-aliasing than the Radeon HD 7750, and should be able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTX 580 37056 Mpixels/sec
Radeon HD 7750 12800 Mpixels/sec
Difference: 24256 (190%)

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

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GeForce GTX 580

Amazon.com

Radeon HD 7750

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

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Model GeForce GTX 580 Radeon HD 7750
Manufacturer nVidia AMD
Year November 2010 February 2012
Code Name GF110 Cape Verde Pro
Fab Process 40 nm 28 nm
Bus PCIe x16 PCIe 3.0 x16
Memory 1536 MB 1024 MB
Core Speed 772 MHz 800 MHz
Shader Speed 1544 MHz (N/A) MHz
Memory Speed 4008 MHz 4500 MHz
Unified Shaders 512 512
Texture Mapping Units 64 32
Render Output Units 48 16
Bus Type GDDR5 GDDR5
Bus Width 384-bit 128-bit
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.2
Power (Max TDP) 244 watts 55 watts
Shader Model 5.0 5.0
Bandwidth 192384 MB/sec 72000 MB/sec
Texel Rate 49408 Mtexels/sec 25600 Mtexels/sec
Pixel Rate 37056 Mpixels/sec 12800 Mpixels/sec

Memory Bandwidth: Bandwidth is the max amount of information (in units of MB per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

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