Nvidia Titan X vs Radeon HD 6990

Intro

Compare all of that to the Radeon HD 6990, which makes use of a 40 nm design. AMD has clocked the core speed at 830 MHz. The GDDR5 RAM works at a speed of 1250 MHz on this particular card. It features 1536 SPUs as well as 96 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Nvidia Titan X		250 Watts
Radeon HD 6990		375 Watts
	Difference: 125 Watts (50%)

Memory Bandwidth

Theoretically speaking, the Nvidia Titan X will be 54% faster than the Radeon HD 6990 in general, because of its greater data rate. (explain)

Nvidia Titan X		491520 MB/sec
Radeon HD 6990		320000 MB/sec
	Difference: 171520 (54%)

Texel Rate

The Nvidia Titan X should be a lot (about 99%) better at anisotropic filtering than the Radeon HD 6990. (explain)

Nvidia Titan X		317408 Mtexels/sec
Radeon HD 6990		159360 Mtexels/sec
	Difference: 158048 (99%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Nvidia Titan X is superior to the Radeon HD 6990, by far. (explain)

Nvidia Titan X		136032 Mpixels/sec
Radeon HD 6990		53120 Mpixels/sec
	Difference: 82912 (156%)

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: Bandwidth is the max amount of data (in units of megabytes per second) that can be moved past the external memory interface within a second. It is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high 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 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 processed in a second.

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