GeForce GTX 560 Ti 448 vs Radeon HD 6990

Intro

Compare all of that 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 memory bus, and uses a 40 nm design. It is made up of 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

Radeon HD 6990		5820 points
GeForce GTX 560 Ti 448		4200 points
	Difference: 1620 (39%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 560 Ti 448		210 Watts
Radeon HD 6990		375 Watts
	Difference: 165 Watts (79%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6990 should in theory be much better than the GeForce GTX 560 Ti 448 overall. (explain)

Radeon HD 6990		320000 MB/sec
GeForce GTX 560 Ti 448		144000 MB/sec
	Difference: 176000 (122%)

Texel Rate

The Radeon HD 6990 will be much (approximately 289%) better at AF than the GeForce GTX 560 Ti 448. (explain)

Radeon HD 6990		159360 Mtexels/sec
GeForce GTX 560 Ti 448		40992 Mtexels/sec
	Difference: 118368 (289%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 6990 is superior to the GeForce GTX 560 Ti 448, and very much so. (explain)

Radeon HD 6990		53120 Mpixels/sec
GeForce GTX 560 Ti 448		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 moved across the external memory interface within a second. It is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.