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

Intro

Compare all of that to the GeForce GTX Titan, which makes use of a 28 nm design. nVidia has set the core frequency at 837 MHz. The GDDR5 memory runs at a speed of 1502 MHz on this specific model. It features 2688 SPUs as well as 224 TAUs and 48 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GTS (G80) 640MB		143 Watts
GeForce GTX Titan		250 Watts
	Difference: 107 Watts (75%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX Titan will be 355% faster than the GeForce 8800 GTS (G80) 640MB overall, because of its greater bandwidth. (explain)

GeForce GTX Titan		288384 MB/sec
GeForce 8800 GTS (G80) 640MB		63360 MB/sec
	Difference: 225024 (355%)

Texel Rate

The GeForce GTX Titan should be a lot (approximately 661%) better at anisotropic filtering than the GeForce 8800 GTS (G80) 640MB. (explain)

GeForce GTX Titan		187488 Mtexels/sec
GeForce 8800 GTS (G80) 640MB		24624 Mtexels/sec
	Difference: 162864 (661%)

Pixel Rate

The GeForce GTX Titan will be much (about 292%) more effective at AA than the GeForce 8800 GTS (G80) 640MB, and also will be able to handle higher resolutions more effectively. (explain)

GeForce GTX Titan		40176 Mpixels/sec
GeForce 8800 GTS (G80) 640MB		10260 Mpixels/sec
	Difference: 29916 (292%)

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 max amount of information (counted in megabytes per second) that can be moved past the external memory interface within a second. It 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 4 instead. The better the 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 texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.