Radeon R9 285 vs Radeon RX 480

Intro

Compare all of that to the Radeon RX 480, which comes with core clock speeds of 1120 MHz on the GPU, and 2000 MHz on the 8192 MB of GDDR5 memory. It features 2304 SPUs as well as 144 TAUs and 32 Rasterization Operator Units.

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 480		13349 points
Radeon R9 285		8500 points
	Difference: 4849 (57%)

Ethereum Mining Hash Rate

Radeon RX 480		27 Mh/s
Radeon R9 285		18 Mh/s
	Difference: 9 (50%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 480		150 Watts
Radeon R9 285		190 Watts
	Difference: 40 Watts (27%)

Memory Bandwidth

Performance-wise, the Radeon RX 480 should in theory be much better than the Radeon R9 285 overall. (explain)

Radeon RX 480		262144 MB/sec
Radeon R9 285		176000 MB/sec
	Difference: 86144 (49%)

Texel Rate

The Radeon RX 480 will be quite a bit (more or less 57%) faster with regards to texture filtering than the Radeon R9 285. (explain)

Radeon RX 480		161280 Mtexels/sec
Radeon R9 285		102816 Mtexels/sec
	Difference: 58464 (57%)

Pixel Rate

The Radeon RX 480 should be much (approximately 22%) more effective at FSAA than the Radeon R9 285, and also should be able to handle higher resolutions while still performing well. (explain)

Radeon RX 480		35840 Mpixels/sec
Radeon R9 285		29376 Mpixels/sec
	Difference: 6464 (22%)

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 information (in units of megabytes per second) that can be moved past the external memory interface in a second. It's calculated by multiplying the interface width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better 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 number of texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total number of texture units of the card 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 in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.