GeForce GTX 560 Ti 448 vs Radeon HD 4850 X2 512MB

Intro

Compare all of that to the Radeon HD 4850 X2 512MB, which features clock speeds of 625 MHz on the GPU, and 993 MHz on the 512 MB of GDDR3 memory. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 560 Ti 448		210 Watts
Radeon HD 4850 X2 512MB		250 Watts
	Difference: 40 Watts (19%)

Memory Bandwidth

Theoretically, the GeForce GTX 560 Ti 448 should perform a bit faster than the Radeon HD 4850 X2 512MB in general. (explain)

GeForce GTX 560 Ti 448		144000 MB/sec
Radeon HD 4850 X2 512MB		127104 MB/sec
	Difference: 16896 (13%)

Texel Rate

The Radeon HD 4850 X2 512MB should be a lot (about 22%) more effective at texture filtering than the GeForce GTX 560 Ti 448. (explain)

Radeon HD 4850 X2 512MB		50000 Mtexels/sec
GeForce GTX 560 Ti 448		40992 Mtexels/sec
	Difference: 9008 (22%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 560 Ti 448 is superior to the Radeon HD 4850 X2 512MB, by far. (explain)

GeForce GTX 560 Ti 448		29280 Mpixels/sec
Radeon HD 4850 X2 512MB		20000 Mpixels/sec
	Difference: 9280 (46%)

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 information (in units of megabytes per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the interface width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total amount of texture units by the core 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 processed in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units 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 is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.