Radeon R9 285 vs Radeon RX 6800 XT

Intro

Compare those specifications to the Radeon RX 6800 XT, which has a GPU core clock speed of 1825 MHz, and 16384 MB of GDDR6 RAM set to run at 2000 MHz through a 256-bit bus. It also is made up of 4608 Stream Processors, 288 TAUs, and 128 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 285		190 Watts
Radeon RX 6800 XT		300 Watts
	Difference: 110 Watts (58%)

Memory Bandwidth

Performance-wise, the Radeon RX 6800 XT should in theory be a lot superior to the Radeon R9 285 overall. (explain)

Radeon RX 6800 XT		524288 MB/sec
Radeon R9 285		176000 MB/sec
	Difference: 348288 (198%)

Texel Rate

The Radeon RX 6800 XT is a lot (more or less 411%) more effective at anisotropic filtering than the Radeon R9 285. (explain)

Radeon RX 6800 XT		525600 Mtexels/sec
Radeon R9 285		102816 Mtexels/sec
	Difference: 422784 (411%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon RX 6800 XT is superior to the Radeon R9 285, by far. (explain)

Radeon RX 6800 XT		233600 Mpixels/sec
Radeon R9 285		29376 Mpixels/sec
	Difference: 204224 (695%)

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 (in units of megabytes per second) that can be moved across the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.