Radeon Pro Duo vs Radeon R9 285

Intro

Compare those specs to the Radeon R9 285, which uses a 28 nm design. AMD has set the core speed at 918 MHz. The GDDR5 RAM works at a speed of 1375 MHz on this specific model. It features 1792 SPUs as well as 112 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 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

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

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

Texel Rate

The Radeon Pro Duo should be much (approximately 398%) better at texture filtering than the Radeon R9 285. (explain)

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

Pixel Rate

The Radeon Pro Duo will be a lot (about 336%) more effective at full screen anti-aliasing than the Radeon R9 285, and also should be capable of handling higher resolutions more effectively. (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 data (measured in megabytes per second) that can be transported over the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total amount of texture units 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 per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.