GeForce 9800 GT 512MB vs GeForce GTX 560

Intro

Compare that to the GeForce GTX 560, which comes with core clock speeds of 810 MHz on the GPU, and 1001 MHz on the 1024 MB of GDDR5 memory. It features 336 SPUs along with 56 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GT 512MB		105 Watts
GeForce GTX 560		150 Watts
	Difference: 45 Watts (43%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 560 is 122% quicker than the GeForce 9800 GT 512MB overall, due to its higher bandwidth. (explain)

GeForce GTX 560		128128 MB/sec
GeForce 9800 GT 512MB		57600 MB/sec
	Difference: 70528 (122%)

Texel Rate

The GeForce GTX 560 is a lot (more or less 35%) better at texture filtering than the GeForce 9800 GT 512MB. (explain)

GeForce GTX 560		45360 Mtexels/sec
GeForce 9800 GT 512MB		33600 Mtexels/sec
	Difference: 11760 (35%)

Pixel Rate

The GeForce GTX 560 is quite a bit (more or less 170%) faster with regards to AA than the GeForce 9800 GT 512MB, and will be capable of handling higher resolutions more effectively. (explain)

GeForce GTX 560		25920 Mpixels/sec
GeForce 9800 GT 512MB		9600 Mpixels/sec
	Difference: 16320 (170%)

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 largest amount of information (measured in MB per second) that can be moved over the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This is worked out by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the video 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 the video card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.