Radeon R9 270 vs Radeon R9 285

Intro

Compare those specs to the Radeon R9 285, which has clock speeds of 918 MHz on the GPU, and 1375 MHz on the 2048 MB of GDDR5 memory. It features 1792 SPUs along with 112 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 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

The Radeon R9 270 should theoretically perform a small bit faster 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 will be quite a bit (approximately 43%) more effective at anisotropic filtering 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 a high screen resolution is important to you, then the Radeon R9 285 is the winner, though only just barely. (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: Bandwidth is the max amount of data (counted in MB per second) that can be transferred over the external memory interface within a second. It is worked out by multiplying the interface width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics 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 maximum number of pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.