GeForce GTX Titan Black vs Radeon HD 7990

Intro

Compare that to the Radeon HD 7990, which features core clock speeds of 950 MHz on the GPU, and 1500 MHz on the 3072 MB of GDDR5 memory. It features 2048 SPUs as well as 128 TAUs 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 HD 7990		15520 points
GeForce GTX Titan Black		11666 points
	Difference: 3854 (33%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX Titan Black		250 Watts
Radeon HD 7990		375 Watts
	Difference: 125 Watts (50%)

Memory Bandwidth

As far as performance goes, the Radeon HD 7990 should in theory be much superior to the GeForce GTX Titan Black in general. (explain)

Radeon HD 7990		576000 MB/sec
GeForce GTX Titan Black		336000 MB/sec
	Difference: 240000 (71%)

Texel Rate

The Radeon HD 7990 should be a little bit (more or less 14%) more effective at AF than the GeForce GTX Titan Black. (explain)

Radeon HD 7990		243200 Mtexels/sec
GeForce GTX Titan Black		213360 Mtexels/sec
	Difference: 29840 (14%)

Pixel Rate

The Radeon HD 7990 is much (more or less 42%) faster with regards to full screen anti-aliasing than the GeForce GTX Titan Black, and also capable of handling higher screen resolutions better. (explain)

Radeon HD 7990		60800 Mpixels/sec
GeForce GTX Titan Black		42672 Mpixels/sec
	Difference: 18128 (42%)

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 max amount of data (measured in megabytes per second) that can be transported across the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. 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 applied in one second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated 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 drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.