GeForce GTX 560 Ti vs Radeon HD 4870 X2

Intro

Compare those specs to the Radeon HD 4870 X2, which features a GPU core clock speed of 750 MHz, and 1024 MB of GDDR5 memory running at 900 MHz through a 256-bit bus. It also is comprised of 800(160x5) SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 560 Ti		170 Watts
Radeon HD 4870 X2		350 Watts
	Difference: 180 Watts (106%)

Memory Bandwidth

As far as performance goes, the Radeon HD 4870 X2 should theoretically be a lot superior to the GeForce GTX 560 Ti overall. (explain)

Radeon HD 4870 X2		230400 MB/sec
GeForce GTX 560 Ti		128256 MB/sec
	Difference: 102144 (80%)

Texel Rate

The Radeon HD 4870 X2 will be just a bit (approximately 14%) more effective at anisotropic filtering than the GeForce GTX 560 Ti. (explain)

Radeon HD 4870 X2		60000 Mtexels/sec
GeForce GTX 560 Ti		52608 Mtexels/sec
	Difference: 7392 (14%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 560 Ti is the winner, but only just. (explain)

GeForce GTX 560 Ti		26304 Mpixels/sec
Radeon HD 4870 X2		24000 Mpixels/sec
	Difference: 2304 (10%)

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 maximum amount of data (in units of megabytes per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the interface width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also 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 ability to get to the maximum fill rate.