GeForce RTX 3080 12 GB vs Radeon R9 285

Intro

Compare those specifications to the Radeon R9 285, which has core speeds of 918 MHz on the GPU, and 1375 MHz on the 2048 MB of GDDR5 RAM. It features 1792 SPUs as well as 112 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 285		190 Watts
GeForce RTX 3080 12 GB		350 Watts
	Difference: 160 Watts (84%)

Memory Bandwidth

Theoretically speaking, the GeForce RTX 3080 12 GB should be 431% quicker than the Radeon R9 285 in general, due to its higher data rate. (explain)

GeForce RTX 3080 12 GB		934298 MB/sec
Radeon R9 285		176000 MB/sec
	Difference: 758298 (431%)

Texel Rate

The GeForce RTX 3080 12 GB should be much (more or less 243%) more effective at texture filtering than the Radeon R9 285. (explain)

GeForce RTX 3080 12 GB		352800 Mtexels/sec
Radeon R9 285		102816 Mtexels/sec
	Difference: 249984 (243%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce RTX 3080 12 GB is a better choice, by far. (explain)

GeForce RTX 3080 12 GB		141120 Mpixels/sec
Radeon R9 285		29376 Mpixels/sec
	Difference: 111744 (380%)

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 largest amount of information (in units of MB per second) that can be transferred across the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total amount of texture units of the card by the core 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 per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.