GeForce GTX 580 3GB vs Radeon RX 550

Intro

Compare all of that to the Radeon RX 550, which features core clock speeds of 1100 MHz on the GPU, and 1750 MHz on the 2048 MB of GDDR5 RAM. It features 512 SPUs along with 32 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 550		50 Watts
GeForce GTX 580 3GB		244 Watts
	Difference: 194 Watts (388%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 580 3GB should perform a lot faster than the Radeon RX 550 overall. (explain)

GeForce GTX 580 3GB		192384 MB/sec
Radeon RX 550		114688 MB/sec
	Difference: 77696 (68%)

Texel Rate

The GeForce GTX 580 3GB will be much (approximately 40%) faster with regards to AF than the Radeon RX 550. (explain)

GeForce GTX 580 3GB		49408 Mtexels/sec
Radeon RX 550		35200 Mtexels/sec
	Difference: 14208 (40%)

Pixel Rate

The GeForce GTX 580 3GB will be quite a bit (about 111%) better at AA than the Radeon RX 550, and should be capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTX 580 3GB		37056 Mpixels/sec
Radeon RX 550		17600 Mpixels/sec
	Difference: 19456 (111%)

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 maximum amount of data (counted in MB per second) that can be moved past the external memory interface in a second. It's calculated by multiplying the bus width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to its 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 core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.