GeForce GTX 580 3GB vs Radeon RX 480 4GB

Intro

Compare that to the Radeon RX 480 4GB, which comes with core clock speeds of 1120 MHz on the GPU, and 1750 MHz on the 4096 MB of GDDR5 memory. It features 2304 SPUs as well as 144 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 480 4GB		150 Watts
GeForce GTX 580 3GB		244 Watts
	Difference: 94 Watts (63%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 480 4GB will be 19% quicker than the GeForce GTX 580 3GB overall, due to its greater bandwidth. (explain)

Radeon RX 480 4GB		229376 MB/sec
GeForce GTX 580 3GB		192384 MB/sec
	Difference: 36992 (19%)

Texel Rate

The Radeon RX 480 4GB will be much (approximately 226%) faster with regards to anisotropic filtering than the GeForce GTX 580 3GB. (explain)

Radeon RX 480 4GB		161280 Mtexels/sec
GeForce GTX 580 3GB		49408 Mtexels/sec
	Difference: 111872 (226%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 580 3GB is the winner, but it probably won't make a huge difference. (explain)

GeForce GTX 580 3GB		37056 Mpixels/sec
Radeon RX 480 4GB		35840 Mpixels/sec
	Difference: 1216 (3%)

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: Bandwidth is the max amount of data (counted in MB per second) that can be transferred past the external memory interface within a second. The number is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster 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 number of texture map elements (texels) that are applied per second. This number is calculated by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

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