GeForce 8800 GTS (G80) 640MB vs GeForce GTX 465

Intro

Compare those specifications to the GeForce GTX 465, which makes use of a 40 nm design. nVidia has set the core frequency at 607 MHz. The GDDR5 RAM works at a frequency of 802 MHz on this card. It features 352 SPUs as well as 44 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GTS (G80) 640MB		143 Watts
GeForce GTX 465		200 Watts
	Difference: 57 Watts (40%)

Memory Bandwidth

In theory, the GeForce GTX 465 is 62% quicker than the GeForce 8800 GTS (G80) 640MB overall, due to its higher bandwidth. (explain)

GeForce GTX 465		102592 MB/sec
GeForce 8800 GTS (G80) 640MB		63360 MB/sec
	Difference: 39232 (62%)

Texel Rate

The GeForce GTX 465 is a bit (about 8%) faster with regards to texture filtering than the GeForce 8800 GTS (G80) 640MB. (explain)

GeForce GTX 465		26708 Mtexels/sec
GeForce 8800 GTS (G80) 640MB		24624 Mtexels/sec
	Difference: 2084 (8%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 465 is superior to the GeForce 8800 GTS (G80) 640MB, and very much so. (explain)

GeForce GTX 465		19424 Mpixels/sec
GeForce 8800 GTS (G80) 640MB		10260 Mpixels/sec
	Difference: 9164 (89%)

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 data (measured in megabytes per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the bus width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, 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 are applied per second. This is worked out by multiplying the total number of texture units by the core clock 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 in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.