Geforce GTX 680 vs Radeon HD 6990

Intro

Compare those specifications to the Radeon HD 6990, which uses a 40 nm design. AMD has set the core speed at 830 MHz. The GDDR5 RAM works at a speed of 1250 MHz on this model. It features 1536 SPUs as well as 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 680		7650 points
Radeon HD 6990		5820 points
	Difference: 1830 (31%)

Ethereum Mining Hash Rate

Radeon HD 6990		24 Mh/s
Geforce GTX 680		16 Mh/s
	Difference: 8 (50%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 680		195 Watts
Radeon HD 6990		375 Watts
	Difference: 180 Watts (92%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6990 will be 66% quicker than the Geforce GTX 680 in general, because of its greater data rate. (explain)

Radeon HD 6990		320000 MB/sec
Geforce GTX 680		192256 MB/sec
	Difference: 127744 (66%)

Texel Rate

The Radeon HD 6990 will be much (approximately 24%) more effective at texture filtering than the Geforce GTX 680. (explain)

Radeon HD 6990		159360 Mtexels/sec
Geforce GTX 680		128768 Mtexels/sec
	Difference: 30592 (24%)

Pixel Rate

The Radeon HD 6990 should be a lot (about 65%) more effective at AA than the Geforce GTX 680, and capable of handling higher resolutions better. (explain)

Radeon HD 6990		53120 Mpixels/sec
Geforce GTX 680		32192 Mpixels/sec
	Difference: 20928 (65%)

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 max amount of information (in units of megabytes per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster 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 amount of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total texture units by the core speed of the chip. The higher this number, 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 that the graphics chip could 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 the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.