Radeon R9 285 vs Radeon RX 580

Intro

Compare that to the Radeon RX 580, which features a core clock frequency of 1257 MHz and a GDDR5 memory speed of 2000 MHz. It also features a 256-bit memory bus, and makes use of a 14 nm design. It is comprised of 2304 SPUs, 144 Texture Address Units, and 32 ROPs.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon RX 580		13630 points
Radeon R9 285		8500 points
	Difference: 5130 (60%)

Ethereum Mining Hash Rate

Radeon RX 580		28 Mh/s
Radeon R9 285		18 Mh/s
	Difference: 10 (56%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 580		185 Watts
Radeon R9 285		190 Watts
	Difference: 5 Watts (3%)

Memory Bandwidth

The Radeon RX 580 should in theory be a lot faster than the Radeon R9 285 in general. (explain)

Radeon RX 580		262144 MB/sec
Radeon R9 285		176000 MB/sec
	Difference: 86144 (49%)

Texel Rate

The Radeon RX 580 will be a lot (more or less 76%) more effective at anisotropic filtering than the Radeon R9 285. (explain)

Radeon RX 580		181008 Mtexels/sec
Radeon R9 285		102816 Mtexels/sec
	Difference: 78192 (76%)

Pixel Rate

The Radeon RX 580 is much (more or less 37%) better at full screen anti-aliasing than the Radeon R9 285, and also able to handle higher resolutions without losing too much performance. (explain)

Radeon RX 580		40224 Mpixels/sec
Radeon R9 285		29376 Mpixels/sec
	Difference: 10848 (37%)

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 largest amount of data (measured in megabytes per second) that can be transferred past the external memory interface in a second. It's worked out by multiplying the bus width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the 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 amount of pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the core 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 fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.