Radeon R9 285 vs Radeon RX 5700 XT

Intro

Compare those specifications to the Radeon RX 5700 XT, which has a clock speed of 1605 MHz and a GDDR6 memory frequency of 1750 MHz. It also makes use of a 256-bit memory bus, and makes use of a 7 nm design. It is comprised of 2560 SPUs, 160 TAUs, 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 should be much faster than the Radeon R9 285 in general. (explain)

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

Texel Rate

The Radeon RX 5700 XT is quite a bit (approximately 150%) better at texture 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

The Radeon RX 5700 XT will be quite a bit (approximately 250%) better at AA than the Radeon R9 285, and also should be able to handle higher resolutions without slowing down too much. (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 maximum amount of data (counted in megabytes per second) that can be transferred over the external memory interface in a second. The number is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better 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 amount of texture map elements (texels) that are processed per second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the card's clock speed. 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 rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.