GeForce 8800 GT 512MB vs GeForce GTX 465

Intro

Compare that to the GeForce GTX 465, which comes with a clock speed of 607 MHz and a GDDR5 memory speed of 802 MHz. It also features a 256-bit memory bus, and uses a 40 nm design. It features 352 SPUs, 44 Texture Address Units, and 32 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 GTX 465		200 Watts
	Difference: 95 Watts (90%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 465 should perform quite a bit faster than the GeForce 8800 GT 512MB in general. (explain)

GeForce GTX 465		102592 MB/sec
GeForce 8800 GT 512MB		57600 MB/sec
	Difference: 44992 (78%)

Texel Rate

The GeForce 8800 GT 512MB will be quite a bit (more or less 26%) faster with regards to anisotropic filtering than the GeForce GTX 465. (explain)

GeForce 8800 GT 512MB		33600 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 6892 (26%)

Pixel Rate

The GeForce GTX 465 is much (more or less 102%) more effective at full screen anti-aliasing than the GeForce 8800 GT 512MB, and able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GTX 465		19424 Mpixels/sec
GeForce 8800 GT 512MB		9600 Mpixels/sec
	Difference: 9824 (102%)

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 (in units of megabytes per second) that can be transported across the external memory interface within a second. It's worked out by multiplying the interface width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could 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 Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.