GeForce 8400 GS 512MB vs GeForce GTX 560 Ti

Intro

Compare all that to the GeForce GTX 560 Ti, which comes with GPU clock speed of 822 MHz, and 1024 MB of GDDR5 memory set to run at 1002 MHz through a 256-bit bus. It also is comprised of 384 Stream Processors, 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

Theoretically speaking, the GeForce GTX 560 Ti will be 1904% quicker than the GeForce 8400 GS 512MB in general, because of its higher 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 should be a lot (about 912%) better 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 a high resolution is important to you, then the GeForce GTX 560 Ti is a better choice, and very much so. (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 largest amount of information (in units of MB per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, 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 texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total number 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 per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the clock speed of the card. 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 is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.