Radeon R9 270 vs Radeon R9 285

Intro

Compare those specs to the Radeon R9 285, which features core speeds of 918 MHz on the GPU, and 1375 MHz on the 2048 MB of GDDR5 memory. It features 1792 SPUs along with 112 TAUs 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 R9 285		8500 points
Radeon R9 270		5943 points
	Difference: 2557 (43%)

Ethereum Mining Hash Rate

Radeon R9 285		18 Mh/s
Radeon R9 270		15 Mh/s
	Difference: 3 (20%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 270		150 Watts
Radeon R9 285		190 Watts
	Difference: 40 Watts (27%)

Memory Bandwidth

In theory, the Radeon R9 270 should be 2% faster than the Radeon R9 285 in general, because of its greater bandwidth. (explain)

Radeon R9 270		179200 MB/sec
Radeon R9 285		176000 MB/sec
	Difference: 3200 (2%)

Texel Rate

The Radeon R9 285 should be a lot (approximately 43%) better at AF than the Radeon R9 270. (explain)

Radeon R9 285		102816 Mtexels/sec
Radeon R9 270		72000 Mtexels/sec
	Difference: 30816 (43%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon R9 285 is the winner, not by a very large margin though. (explain)

Radeon R9 285		29376 Mpixels/sec
Radeon R9 270		28800 Mpixels/sec
	Difference: 576 (2%)

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 (in units of MB per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the interface width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the card's clock speed. 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, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.