GeForce 8400 GS 512MB vs GeForce GTX 560 Ti

Intro

Compare all that to the GeForce GTX 560 Ti, which uses a 40 nm design. nVidia has set the core speed at 822 MHz. The GDDR5 memory works at a speed of 1002 MHz on this specific model. It features 384 SPUs as well as 64 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8400 GS 512MB		40 Watts
GeForce GTX 560 Ti		170 Watts
	Difference: 130 Watts (325%)

Memory Bandwidth

The GeForce GTX 560 Ti should in theory be quite a bit faster than the GeForce 8400 GS 512MB overall. (explain)

GeForce GTX 560 Ti		128256 MB/sec
GeForce 8400 GS 512MB		6400 MB/sec
	Difference: 121856 (1904%)

Texel Rate

The GeForce GTX 560 Ti should be much (approximately 912%) more effective at AF than the GeForce 8400 GS 512MB. (explain)

GeForce GTX 560 Ti		52608 Mtexels/sec
GeForce 8400 GS 512MB		5200 Mtexels/sec
	Difference: 47408 (912%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 560 Ti is superior to the GeForce 8400 GS 512MB, by a large margin. (explain)

GeForce GTX 560 Ti		26304 Mpixels/sec
GeForce 8400 GS 512MB		2600 Mpixels/sec
	Difference: 23704 (912%)

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 data (in units of megabytes per second) that can be moved past the external memory interface within a second. It's calculated by multiplying the interface width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This 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 graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount 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 output rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.