Radeon R9 285 vs Radeon RX 6800

Intro

Compare that to the Radeon RX 6800, which uses a 7 nm design. AMD has set the core speed at 1700 MHz. The GDDR6 memory works at a frequency of 2000 MHz on this specific card. It features 3840 SPUs as well as 240 TAUs and 96 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 285		190 Watts
Radeon RX 6800		250 Watts
	Difference: 60 Watts (32%)

Memory Bandwidth

Performance-wise, the Radeon RX 6800 should in theory be much superior to the Radeon R9 285 in general. (explain)

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

Texel Rate

The Radeon RX 6800 should be quite a bit (approximately 297%) more effective at anisotropic filtering than the Radeon R9 285. (explain)

Radeon RX 6800		408000 Mtexels/sec
Radeon R9 285		102816 Mtexels/sec
	Difference: 305184 (297%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon RX 6800 is superior to the Radeon R9 285, by far. (explain)

Radeon RX 6800		163200 Mpixels/sec
Radeon R9 285		29376 Mpixels/sec
	Difference: 133824 (456%)

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 information (measured in MB per second) that can be transferred across the external memory interface within a second. It is calculated by multiplying the bus width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher 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 texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the 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 maximum amount of pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the card's 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 output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.