GeForce GTX 560 Ti vs Radeon HD 4870 512MB

Intro

Compare all of that to the Radeon HD 4870 512MB, which features core clock speeds of 750 MHz on the GPU, and 900 MHz on the 512 MB of GDDR5 memory. It features 800(160x5) SPUs along with 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4870 512MB		150 Watts
GeForce GTX 560 Ti		170 Watts
	Difference: 20 Watts (13%)

Memory Bandwidth

The GeForce GTX 560 Ti should theoretically perform just a bit faster than the Radeon HD 4870 512MB overall. (explain)

GeForce GTX 560 Ti		128256 MB/sec
Radeon HD 4870 512MB		115200 MB/sec
	Difference: 13056 (11%)

Texel Rate

The GeForce GTX 560 Ti will be quite a bit (about 75%) more effective at anisotropic filtering than the Radeon HD 4870 512MB. (explain)

GeForce GTX 560 Ti		52608 Mtexels/sec
Radeon HD 4870 512MB		30000 Mtexels/sec
	Difference: 22608 (75%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 560 Ti is a better choice, by far. (explain)

GeForce GTX 560 Ti		26304 Mpixels/sec
Radeon HD 4870 512MB		12000 Mpixels/sec
	Difference: 14304 (119%)

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.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the max amount of information (counted in megabytes per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

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