Geforce GTX 690 vs Radeon HD 6990

Intro

Compare all that to the Radeon HD 6990, which features a core clock frequency of 830 MHz and a GDDR5 memory frequency of 1250 MHz. It also uses a 256-bit bus, and uses a 40 nm design. It features 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 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

As far as performance goes, the Geforce GTX 690 should theoretically be a bit superior to 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 is quite a bit (more or less 47%) better 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 should be a little bit (about 10%) better at AA than the Radeon HD 6990, and capable of handling 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 maximum amount of data (counted in MB per second) that can be moved over the external memory interface in one second. It is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output 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 maximum fill rate.