GeForce 8400 GS 512MB vs GeForce GTX 560 Ti

Intro

Compare those specs to the GeForce GTX 560 Ti, which uses a 40 nm design. nVidia has clocked the core speed at 822 MHz. The GDDR5 memory runs at a frequency of 1002 MHz on this particular model. It features 384 SPUs as well as 64 Texture Address Units and 32 Rasterization Operator Units.

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

Theoretically speaking, the GeForce GTX 560 Ti should be 1904% quicker than the GeForce 8400 GS 512MB in general, because of its greater data rate. (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 a lot (approximately 912%) faster with regards to 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

The GeForce GTX 560 Ti will be a lot (more or less 912%) faster with regards to full screen anti-aliasing than the GeForce 8400 GS 512MB, and should be capable of handling higher resolutions while still performing well. (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 moved over the external memory interface in one second. The number is calculated by multiplying the interface width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This number is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.