Geforce GTX 670 vs Radeon HD 6990

Intro

Compare that to the Radeon HD 6990, which uses a 40 nm design. AMD has clocked the core speed at 830 MHz. The GDDR5 RAM works at a speed of 1250 MHz on this specific model. It features 1536 SPUs as well as 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 670		7351 points
Radeon HD 6990		5820 points
	Difference: 1531 (26%)

Ethereum Mining Hash Rate

Radeon HD 6990		24 Mh/s
Geforce GTX 670		13 Mh/s
	Difference: 11 (85%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 670		170 Watts
Radeon HD 6990		375 Watts
	Difference: 205 Watts (121%)

Memory Bandwidth

Theoretically, the Radeon HD 6990 should perform quite a bit faster than the Geforce GTX 670 in general. (explain)

Radeon HD 6990		320000 MB/sec
Geforce GTX 670		192000 MB/sec
	Difference: 128000 (67%)

Texel Rate

The Radeon HD 6990 should be much (about 56%) more effective at anisotropic filtering than the Geforce GTX 670. (explain)

Radeon HD 6990		159360 Mtexels/sec
Geforce GTX 670		102480 Mtexels/sec
	Difference: 56880 (56%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 6990 is the winner, by a large margin. (explain)

Radeon HD 6990		53120 Mpixels/sec
Geforce GTX 670		29280 Mpixels/sec
	Difference: 23840 (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 data (in units of MB per second) that can be transported past the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at 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 can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.