Radeon R9 270 vs Radeon R9 285

Intro

Compare all that to the Radeon R9 285, which uses a 28 nm design. AMD has set the core frequency at 918 MHz. The GDDR5 RAM is set to run at a speed of 1375 MHz on this specific model. It features 1792 SPUs along with 112 Texture Address Units 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 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

Performance-wise, the Radeon R9 270 should theoretically be just a bit better than the Radeon R9 285 overall. (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

The Radeon R9 285 will be a little bit (more or less 2%) more effective at AA than the Radeon R9 270, and will be capable of handling higher resolutions more effectively. (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 (counted in MB per second) that can be transferred across the external memory interface within a second. It's worked out by multiplying the bus width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, 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 are applied per second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video 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 most pixels that the graphics chip can possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.