Radeon HD 7990 vs Radeon Pro Duo

Intro

Compare all that to the Radeon Pro Duo, which comes with GPU core speed of 1000 MHz, and 4096 MB of HBM RAM running at 500 MHz through a 4096-bit bus. It also is comprised of 4096 Stream Processors, 256 TAUs, and 64 ROPs.

Display Graphs

Hide Graphs

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 is 78% faster than the Radeon HD 7990 overall, because of its higher bandwidth. (explain)

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

Texel Rate

The Radeon Pro Duo should be much (approximately 111%) better at 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 should be much (about 111%) more effective at full screen anti-aliasing than the Radeon HD 7990, and will be able to handle higher resolutions while still performing well. (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: Memory bandwidth is the largest amount of information (in units of MB per second) that can be transported over the external memory interface in one second. It is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.