GeForce GTX Titan Black vs Radeon HD 7950 3GB

Intro

Compare those specifications to the Radeon HD 7950 3GB, which features GPU clock speed of 800 MHz, and 3072 MB of GDDR5 memory running at 1250 MHz through a 384-bit bus. It also is comprised of 1792 SPUs, 112 Texture Address Units, and 32 Raster Operation 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

Theoretically speaking, the GeForce GTX Titan Black should be 40% faster than the Radeon HD 7950 3GB overall, 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 is a lot (about 138%) faster with regards to AF 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

If using high levels of AA is important to you, then the GeForce GTX Titan Black is superior to the Radeon HD 7950 3GB, by far. (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: Bandwidth is the max amount of information (in units of megabytes per second) that can be transferred over the external memory interface within a second. It is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This number is calculated 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.