GeForce 8800 GT 512MB vs GeForce 8800 GTX

Intro

Compare all that to the GeForce 8800 GTX, which comes with a core clock frequency of 575 MHz and a GDDR3 memory frequency of 900 MHz. It also makes use of a 384-bit memory bus, and uses a 90 nm design. It is made up of 128 SPUs, 64 TAUs, and 24 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GT 512MB		105 Watts
GeForce 8800 GTX		155 Watts
	Difference: 50 Watts (48%)

Memory Bandwidth

Performance-wise, the GeForce 8800 GTX should theoretically be a lot better than the GeForce 8800 GT 512MB in general. (explain)

GeForce 8800 GTX		86400 MB/sec
GeForce 8800 GT 512MB		57600 MB/sec
	Difference: 28800 (50%)

Texel Rate

The GeForce 8800 GTX is a bit (approximately 10%) faster with regards to texture filtering than the GeForce 8800 GT 512MB. (explain)

GeForce 8800 GTX		36800 Mtexels/sec
GeForce 8800 GT 512MB		33600 Mtexels/sec
	Difference: 3200 (10%)

Pixel Rate

The GeForce 8800 GTX is much (approximately 44%) more effective at AA than the GeForce 8800 GT 512MB, and able to handle higher resolutions without slowing down too much. (explain)

GeForce 8800 GTX		13800 Mpixels/sec
GeForce 8800 GT 512MB		9600 Mpixels/sec
	Difference: 4200 (44%)

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 maximum amount of data (in units of megabytes per second) that can be transferred over the external memory interface in one second. The number is calculated by multiplying the card's bus width by its memory speed. If it uses DDR memory, it should be multiplied by 2 again. If it uses 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, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the card's 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 output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.