Geforce GTX 690 vs Radeon HD 6990

Intro

Compare those specs to the Radeon HD 6990, which comes with a clock speed of 830 MHz and a GDDR5 memory speed of 1250 MHz. It also features a 256-bit bus, and uses a 40 nm design. It is made up of 1536 SPUs, 96 TAUs, and 32 Raster Operation Units.

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 690		13111 points
Radeon HD 6990		5820 points
	Difference: 7291 (125%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 690		300 Watts
Radeon HD 6990		375 Watts
	Difference: 75 Watts (25%)

Memory Bandwidth

In theory, the Geforce GTX 690 should be just a bit faster than the Radeon HD 6990 in general. (explain)

Geforce GTX 690		384512 MB/sec
Radeon HD 6990		320000 MB/sec
	Difference: 64512 (20%)

Texel Rate

The Geforce GTX 690 should be quite a bit (more or less 47%) more effective at texture filtering than the Radeon HD 6990. (explain)

Geforce GTX 690		234240 Mtexels/sec
Radeon HD 6990		159360 Mtexels/sec
	Difference: 74880 (47%)

Pixel Rate

The Geforce GTX 690 will be just a bit (more or less 10%) better at FSAA than the Radeon HD 6990, and also will be able to handle higher resolutions while still performing well. (explain)

Geforce GTX 690		58560 Mpixels/sec
Radeon HD 6990		53120 Mpixels/sec
	Difference: 5440 (10%)

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 (measured in megabytes per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at handling 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 the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.