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GeForce GTX 580 vs Radeon HD 7750

Intro

The GeForce GTX 580 features core 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 TAUs and 48 Rasterization Operator Units.

Compare that to the Radeon HD 7750, which features GPU 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 SPUs, 32 Texture Address Units, and 16 ROPs.

Display Graphs

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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

In theory, the GeForce GTX 580 will be 167% quicker than the Radeon HD 7750 overall, due to its higher 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 much (approximately 93%) faster with regards to AF than the Radeon HD 7750. (explain)

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

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 580 is superior to the Radeon HD 7750, by far. (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
Memory 1536 MB 1024 MB
Core Speed 772 MHz 800 MHz
Memory Speed 4008 MHz 4500 MHz
Power (Max TDP) 244 watts 55 watts
Bandwidth 192384 MB/sec 72000 MB/sec
Texel Rate 49408 Mtexels/sec 25600 Mtexels/sec
Pixel Rate 37056 Mpixels/sec 12800 Mpixels/sec
Unified Shaders 512 512
Texture Mapping Units 64 32
Render Output Units 48 16
Bus Type GDDR5 GDDR5
Bus Width 384-bit 128-bit
Fab Process 40 nm 28 nm
Transistors 3000 million 1500 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.2

Memory Bandwidth: Bandwidth is the largest amount of data (in units of MB per second) that can be transported over the external memory interface within a second. It's worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high 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 texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

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