GeForce GTX Titan X vs Radeon HD 6990

Intro

Compare those specs to the Radeon HD 6990, which has GPU clock speed of 830 MHz, and 2048 MB of GDDR5 memory running at 1250 MHz through a 256-bit bus. It also is comprised of 1536 Stream Processors, 96 Texture Address Units, 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

GeForce GTX Titan X		17879 points
Radeon HD 6990		5820 points
	Difference: 12059 (207%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

As far as performance goes, the GeForce GTX Titan X should theoretically be a bit superior to the Radeon HD 6990 in general. (explain)

GeForce GTX Titan X		336000 MB/sec
Radeon HD 6990		320000 MB/sec
	Difference: 16000 (5%)

Texel Rate

The GeForce GTX Titan X will be a bit (approximately 20%) faster with regards to AF than the Radeon HD 6990. (explain)

GeForce GTX Titan X		192000 Mtexels/sec
Radeon HD 6990		159360 Mtexels/sec
	Difference: 32640 (20%)

Pixel Rate

The GeForce GTX Titan X should be quite a bit (more or less 81%) more effective at anti-aliasing than the Radeon HD 6990, and will be capable of handling higher screen resolutions while still performing well. (explain)

GeForce GTX Titan X		96000 Mpixels/sec
Radeon HD 6990		53120 Mpixels/sec
	Difference: 42880 (81%)

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 maximum amount of information (counted in megabytes per second) that can be moved over the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount 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 outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.