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GeForce GTX 580 vs Radeon HD 7750

Intro

The GeForce GTX 580 comes with core speeds of 772 MHz on the GPU, and 1002 MHz on the 1536 MB of GDDR5 memory. It features 512 SPUs along with 64 TAUs and 48 Rasterization Operator Units.

Compare those specifications to the Radeon HD 7750, which makes use of a 28 nm design. AMD has set the core frequency at 800 MHz. The GDDR5 RAM is set to run at a frequency of 1125 MHz on this model. It features 512 SPUs as well as 32 Texture Address Units and 16 Rasterization Operator Units.

(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

The GeForce GTX 580 should in theory be much faster than the Radeon HD 7750 overall. (explain)

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

Texel Rate

The GeForce GTX 580 should be much (about 93%) more effective at 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 using a high screen resolution is important to you, then the GeForce GTX 580 is a better choice, 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

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

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 1002 MHz (4008 MHz effective) 1125 MHz (4500 MHz effective)
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 largest amount of data (in units of MB per second) that can be moved across the external memory interface in one second. It's calculated by multiplying the bus width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the 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 number of pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the card's clock speed. 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 rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.

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