Radeon R9 285 vs Radeon RX 6800

Intro

Compare those specifications to the Radeon RX 6800, which has GPU core speed of 1700 MHz, and 16384 MB of GDDR6 memory running at 2000 MHz through a 256-bit bus. It also features 3840 SPUs, 240 Texture Address Units, and 96 Raster Operation Units.

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

Theoretically speaking, the Radeon RX 6800 is 198% faster than the Radeon R9 285 overall, due to its higher data rate. (explain)

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

Texel Rate

The Radeon RX 6800 will be a lot (approximately 297%) better 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 screen 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: Memory bandwidth is the maximum amount of data (counted in MB per second) that can be moved across the external memory interface in one second. It's worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This is calculated 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.