GeForce GTX 465 vs Radeon RX 580

Intro

Compare all that to the Radeon RX 580, which comes with a GPU core clock speed of 1257 MHz, and 8192 MB of GDDR5 RAM set to run at 2000 MHz through a 256-bit bus. It also features 2304 SPUs, 144 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 580		185 Watts
GeForce GTX 465		200 Watts
	Difference: 15 Watts (8%)

Memory Bandwidth

The Radeon RX 580, in theory, should be a lot faster than the GeForce GTX 465 overall. (explain)

Radeon RX 580		262144 MB/sec
GeForce GTX 465		102592 MB/sec
	Difference: 159552 (156%)

Texel Rate

The Radeon RX 580 is a lot (more or less 578%) better at texture filtering than the GeForce GTX 465. (explain)

Radeon RX 580		181008 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 154300 (578%)

Pixel Rate

The Radeon RX 580 is quite a bit (about 107%) better at full screen anti-aliasing than the GeForce GTX 465, and capable of handling higher resolutions without slowing down too much. (explain)

Radeon RX 580		40224 Mpixels/sec
GeForce GTX 465		19424 Mpixels/sec
	Difference: 20800 (107%)

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 max amount of information (in units of megabytes per second) that can be moved across the external memory interface in one second. The number is worked out by multiplying the bus width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at 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 the video card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.