GeForce 8800 GTX vs GeForce GTX 560

Intro

Compare that to the GeForce GTX 560, which has GPU clock speed of 810 MHz, and 1024 MB of GDDR5 memory set to run at 1001 MHz through a 256-bit bus. It also features 336 SPUs, 56 TAUs, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 560		150 Watts
GeForce 8800 GTX		155 Watts
	Difference: 5 Watts (3%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 560 should be 48% faster than the GeForce 8800 GTX overall, due to its greater data rate. (explain)

GeForce GTX 560		128128 MB/sec
GeForce 8800 GTX		86400 MB/sec
	Difference: 41728 (48%)

Texel Rate

The GeForce GTX 560 is quite a bit (approximately 23%) better at anisotropic filtering than the GeForce 8800 GTX. (explain)

GeForce GTX 560		45360 Mtexels/sec
GeForce 8800 GTX		36800 Mtexels/sec
	Difference: 8560 (23%)

Pixel Rate

The GeForce GTX 560 will be quite a bit (about 88%) faster with regards to full screen anti-aliasing than the GeForce 8800 GTX, and also able to handle higher screen resolutions while still performing well. (explain)

GeForce GTX 560		25920 Mpixels/sec
GeForce 8800 GTX		13800 Mpixels/sec
	Difference: 12120 (88%)

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 transported across the external memory interface within a second. It is worked out by multiplying the interface width by its memory speed. In the case of DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 number of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units 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 also depends on quite a few 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.