GeForce 8400 GS 512MB vs GeForce GTX 560 Ti

Intro

Compare those specs to the GeForce GTX 560 Ti, which makes use of a 40 nm design. nVidia has set the core frequency at 822 MHz. The GDDR5 memory works at a frequency of 1002 MHz on this specific card. It features 384 SPUs as well as 64 TAUs and 32 ROPs.

Display Graphs

Hide Graphs

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

Theoretically speaking, the GeForce GTX 560 Ti should be 1904% quicker than the GeForce 8400 GS 512MB in general, because of its greater bandwidth. (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 is a lot (approximately 912%) better at texture filtering 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 high levels of AA is important to you, then the GeForce GTX 560 Ti is the winner, by far. (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: Memory bandwidth is the maximum amount of information (in units of megabytes per second) that can be transferred over the external memory interface in a second. The number is worked out by multiplying the bus width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the 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 maximum amount of pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.