GeForce GTX Titan X vs Radeon HD 6990

Intro

Compare those specifications to the Radeon HD 6990, which features a clock speed of 830 MHz and a GDDR5 memory frequency of 1250 MHz. It also features a 256-bit memory bus, and makes use of a 40 nm design. It is comprised of 1536 SPUs, 96 TAUs, 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

In theory, the GeForce GTX Titan X is 5% quicker than the Radeon HD 6990 in general, due to its higher bandwidth. (explain)

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

Texel Rate

The GeForce GTX Titan X should be just a bit (more or less 20%) faster with regards to texture filtering than the Radeon HD 6990. (explain)

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

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX Titan X is a better choice, by far. (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: Bandwidth is the maximum amount of data (in units of megabytes per second) that can be transferred over the external memory interface in a second. It is worked out by multiplying the interface width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's 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 texture map elements (texels) that can be applied per second. This number is worked out 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core 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 also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.