GeForce GTX Titan Black vs Radeon HD 4790

Intro

Compare those specifications to the Radeon HD 4790, which makes use of a 55 nm design. AMD has clocked the core speed at 600 MHz. The GDDR5 RAM runs at a frequency of 800 MHz on this particular model. It features 640(128x5) SPUs along with 32 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the GeForce GTX Titan Black should be a lot faster than the Radeon HD 4790 overall. (explain)

GeForce GTX Titan Black		336000 MB/sec
Radeon HD 4790		102400 MB/sec
	Difference: 233600 (228%)

Texel Rate

The GeForce GTX Titan Black will be much (about 1011%) better at anisotropic filtering than the Radeon HD 4790. (explain)

GeForce GTX Titan Black		213360 Mtexels/sec
Radeon HD 4790		19200 Mtexels/sec
	Difference: 194160 (1011%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX Titan Black is the winner, by a large margin. (explain)

GeForce GTX Titan Black		42672 Mpixels/sec
Radeon HD 4790		9600 Mpixels/sec
	Difference: 33072 (345%)

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 maximum amount of information (measured in MB per second) that can be transported over the external memory interface in one second. It's calculated by multiplying the interface width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 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, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.