GeForce GTX 560 Ti 448 vs Radeon HD 6990

Intro

Compare those specs to the Radeon HD 6990, which has GPU clock speed of 830 MHz, and 2048 MB of GDDR5 RAM set to run at 1250 MHz through a 256-bit bus. It also is comprised of 1536 Stream Processors, 96 Texture Address Units, and 32 Raster Operation Units.

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

Theoretically speaking, the Radeon HD 6990 should be a lot faster than the GeForce GTX 560 Ti 448 in general. (explain)

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

Texel Rate

The Radeon HD 6990 should be quite a bit (more or less 289%) more effective at texture filtering 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

The Radeon HD 6990 is much (more or less 81%) more effective at full screen anti-aliasing than the GeForce GTX 560 Ti 448, and will be able to handle higher screen resolutions more effectively. (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: Bandwidth is the max amount of data (counted in MB per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the interface width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total amount of texture units by the core 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 in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could 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 speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.