Radeon Pro Duo vs Radeon R9 285

Intro

Compare that to the Radeon R9 285, which has GPU clock speed of 918 MHz, and 2048 MB of GDDR5 RAM set to run at 1375 MHz through a 256-bit bus. It also features 1792 Stream Processors, 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 Pro Duo		27167 points
Radeon R9 285		8500 points
	Difference: 18667 (220%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 285		190 Watts
Radeon Pro Duo		350 Watts
	Difference: 160 Watts (84%)

Memory Bandwidth

Theoretically, the Radeon Pro Duo should perform quite a bit faster than the Radeon R9 285 in general. (explain)

Radeon Pro Duo		1024000 MB/sec
Radeon R9 285		176000 MB/sec
	Difference: 848000 (482%)

Texel Rate

The Radeon Pro Duo is a lot (more or less 398%) more effective at anisotropic filtering than the Radeon R9 285. (explain)

Radeon Pro Duo		512000 Mtexels/sec
Radeon R9 285		102816 Mtexels/sec
	Difference: 409184 (398%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon Pro Duo is the winner, by a large margin. (explain)

Radeon Pro Duo		128000 Mpixels/sec
Radeon R9 285		29376 Mpixels/sec
	Difference: 98624 (336%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the max amount of information (counted in megabytes per second) that can be transferred past the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the 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 number of texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the card's 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 is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.