GeForce 8800 GTS (G80) 320MB vs GeForce GT 240 GDDR5

Intro

Compare that to the GeForce GT 240 GDDR5, which comes with GPU clock speed of 550 MHz, and 512 MB of GDDR5 memory set to run at 850 MHz through a 128-bit bus. It also features 96 Stream Processors, 32 TAUs, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5		70 Watts
GeForce 8800 GTS (G80) 320MB		143 Watts
	Difference: 73 Watts (104%)

Memory Bandwidth

The GeForce 8800 GTS (G80) 320MB should in theory be a small bit faster than the GeForce GT 240 GDDR5 overall. (explain)

GeForce 8800 GTS (G80) 320MB		63360 MB/sec
GeForce GT 240 GDDR5		54400 MB/sec
	Difference: 8960 (16%)

Texel Rate

The GeForce 8800 GTS (G80) 320MB should be quite a bit (more or less 40%) faster with regards to texture filtering than the GeForce GT 240 GDDR5. (explain)

GeForce 8800 GTS (G80) 320MB		24624 Mtexels/sec
GeForce GT 240 GDDR5		17600 Mtexels/sec
	Difference: 7024 (40%)

Pixel Rate

The GeForce 8800 GTS (G80) 320MB is a lot (more or less 133%) better at FSAA than the GeForce GT 240 GDDR5, and also should be able to handle higher resolutions better. (explain)

GeForce 8800 GTS (G80) 320MB		10260 Mpixels/sec
GeForce GT 240 GDDR5		4400 Mpixels/sec
	Difference: 5860 (133%)

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 (counted in MB per second) that can be transported across the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the video 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 that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. 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 rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.