Geforce GTX 670 vs Radeon HD 6990

Intro

Compare all that to the Radeon HD 6990, which uses a 40 nm design. AMD has set the core speed at 830 MHz. The GDDR5 memory works at a speed of 1250 MHz on this specific card. 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

In theory, the Radeon HD 6990 is 67% faster than the Geforce GTX 670 overall, because of its higher bandwidth. (explain)

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

Texel Rate

The Radeon HD 6990 will be a lot (approximately 56%) better at texture filtering than the Geforce GTX 670. (explain)

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

Pixel Rate

The Radeon HD 6990 is a lot (about 81%) more effective at anti-aliasing than the Geforce GTX 670, and able to handle higher resolutions without slowing down too much. (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 largest amount of information (measured in MB per second) that can be transported past 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 memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines 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 output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.