GeForce GTX 580 3GB vs Geforce GTX 770

Intro

Compare those specifications to the Geforce GTX 770, which comes with core speeds of 1046 MHz on the GPU, and 1753 MHz on the 2048 MB of GDDR5 memory. It features 1536 SPUs as well as 128 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 770		230 Watts
GeForce GTX 580 3GB		244 Watts
	Difference: 14 Watts (6%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 770 is 17% quicker than the GeForce GTX 580 3GB overall, because of its higher data rate. (explain)

Geforce GTX 770		224384 MB/sec
GeForce GTX 580 3GB		192384 MB/sec
	Difference: 32000 (17%)

Texel Rate

The Geforce GTX 770 should be quite a bit (approximately 171%) more effective at AF than the GeForce GTX 580 3GB. (explain)

Geforce GTX 770		133888 Mtexels/sec
GeForce GTX 580 3GB		49408 Mtexels/sec
	Difference: 84480 (171%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 580 3GB is a better choice, though only just barely. (explain)

GeForce GTX 580 3GB		37056 Mpixels/sec
Geforce GTX 770		33472 Mpixels/sec
	Difference: 3584 (11%)

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

Specifications

Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in megabytes per second) that can be transported past the external memory interface in a second. The number is calculated by multiplying the bus width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 once again. If 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total number 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the clock speed of the card. 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 many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.