Radeon HD 7870 XT vs Radeon Pro Duo

Intro

Compare those specifications to the Radeon Pro Duo, which uses a 28 nm design. AMD has set the core speed at 1000 MHz. The HBM RAM works at a speed of 500 MHz on this particular card. It features 4096 SPUs along with 256 Texture Address Units and 64 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 HD 7870 XT		6390 points
	Difference: 20777 (325%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7870 XT		185 Watts
Radeon Pro Duo		350 Watts
	Difference: 165 Watts (89%)

Memory Bandwidth

Performance-wise, the Radeon Pro Duo should in theory be a lot better than the Radeon HD 7870 XT overall. (explain)

Radeon Pro Duo		1024000 MB/sec
Radeon HD 7870 XT		192000 MB/sec
	Difference: 832000 (433%)

Texel Rate

The Radeon Pro Duo will be much (about 477%) faster with regards to texture filtering than the Radeon HD 7870 XT. (explain)

Radeon Pro Duo		512000 Mtexels/sec
Radeon HD 7870 XT		88800 Mtexels/sec
	Difference: 423200 (477%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon Pro Duo is the winner, and very much so. (explain)

Radeon Pro Duo		128000 Mpixels/sec
Radeon HD 7870 XT		29600 Mpixels/sec
	Difference: 98400 (332%)

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 transferred past the external memory interface in one second. It's calculated by multiplying the bus width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better 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 texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.