GeForce GTX Titan Black vs Radeon HD 7950 3GB

Intro

Compare those specifications to the Radeon HD 7950 3GB, which comes with core speeds of 800 MHz on the GPU, and 1250 MHz on the 3072 MB of GDDR5 RAM. It features 1792 SPUs as well as 112 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7950 3GB		200 Watts
GeForce GTX Titan Black		250 Watts
	Difference: 50 Watts (25%)

Memory Bandwidth

In theory, the GeForce GTX Titan Black should be 40% quicker than the Radeon HD 7950 3GB in general, because of its greater bandwidth. (explain)

GeForce GTX Titan Black		336000 MB/sec
Radeon HD 7950 3GB		240000 MB/sec
	Difference: 96000 (40%)

Texel Rate

The GeForce GTX Titan Black will be quite a bit (more or less 138%) more effective at texture filtering than the Radeon HD 7950 3GB. (explain)

GeForce GTX Titan Black		213360 Mtexels/sec
Radeon HD 7950 3GB		89600 Mtexels/sec
	Difference: 123760 (138%)

Pixel Rate

The GeForce GTX Titan Black will be much (about 67%) faster with regards to FSAA than the Radeon HD 7950 3GB, and also should be able to handle higher resolutions without slowing down too much. (explain)

GeForce GTX Titan Black		42672 Mpixels/sec
Radeon HD 7950 3GB		25600 Mpixels/sec
	Difference: 17072 (67%)

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.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the maximum amount of information (in units of MB per second) that can be transferred across the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. 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 texture map elements (texels) that are processed in one second. This is worked out by multiplying the total number of texture units 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 applied in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.