Radeon HD 7990 vs Radeon Pro Duo

Intro

Compare those specifications to the Radeon Pro Duo, which features core clock speeds of 1000 MHz on the GPU, and 500 MHz on the 4096 MB of HBM memory. It features 4096 SPUs along with 256 Texture Address Units and 64 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 HD 7990		15520 points
	Difference: 11647 (75%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon Pro Duo		350 Watts
Radeon HD 7990		375 Watts
	Difference: 25 Watts (7%)

Memory Bandwidth

Theoretically speaking, the Radeon Pro Duo should perform much faster than the Radeon HD 7990 overall. (explain)

Radeon Pro Duo		1024000 MB/sec
Radeon HD 7990		576000 MB/sec
	Difference: 448000 (78%)

Texel Rate

The Radeon Pro Duo is much (about 111%) faster with regards to anisotropic filtering than the Radeon HD 7990. (explain)

Radeon Pro Duo		512000 Mtexels/sec
Radeon HD 7990		243200 Mtexels/sec
	Difference: 268800 (111%)

Pixel Rate

The Radeon Pro Duo will be quite a bit (about 111%) better at anti-aliasing than the Radeon HD 7990, and also should be able to handle higher resolutions without losing too much performance. (explain)

Radeon Pro Duo		128000 Mpixels/sec
Radeon HD 7990		60800 Mpixels/sec
	Difference: 67200 (111%)

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 (in units of megabytes per second) that can be transferred past the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory speed. If the card has DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster 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 in one second. This is worked out by multiplying the total texture units by the core clock 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 applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines 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 output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.