Radeon R9 285 vs Radeon RX 5700 XT

Intro

Compare all that to the Radeon RX 5700 XT, which has GPU core speed of 1605 MHz, and 8096 MB of GDDR6 memory running at 1750 MHz through a 256-bit bus. It also features 2560 SPUs, 160 Texture Address Units, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 285		190 Watts
Radeon RX 5700 XT		225 Watts
	Difference: 35 Watts (18%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 5700 XT will be 161% quicker than the Radeon R9 285 overall, because of its higher bandwidth. (explain)

Radeon RX 5700 XT		458752 MB/sec
Radeon R9 285		176000 MB/sec
	Difference: 282752 (161%)

Texel Rate

The Radeon RX 5700 XT should be much (about 150%) more effective at anisotropic filtering than the Radeon R9 285. (explain)

Radeon RX 5700 XT		256800 Mtexels/sec
Radeon R9 285		102816 Mtexels/sec
	Difference: 153984 (150%)

Pixel Rate

If using a high resolution is important to you, then the Radeon RX 5700 XT is the winner, by a large margin. (explain)

Radeon RX 5700 XT		102720 Mpixels/sec
Radeon R9 285		29376 Mpixels/sec
	Difference: 73344 (250%)

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 max amount of information (counted in megabytes per second) that can be moved over the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, 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 are applied in one second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.