GeForce GTX 560 Ti 448 vs Radeon HD 6990

Intro

Compare that to the Radeon HD 6990, which makes use of a 40 nm design. AMD has set the core speed at 830 MHz. The GDDR5 RAM is set to run at a speed of 1250 MHz on this 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

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 theoretically be a lot 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 is a lot (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

The Radeon HD 6990 is quite a bit (about 81%) more effective at full screen anti-aliasing than the GeForce GTX 560 Ti 448, and also should be capable of handling higher resolutions better. (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 largest amount of information (measured in megabytes per second) that can be transported past the external memory interface in one second. The number is calculated by multiplying the interface width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better 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 number of texture map elements (texels) that are processed per second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.