GeForce 8800 GTS (G80) 320MB vs GeForce GT 340

Intro

Compare all of that to the GeForce GT 340, which has 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 is made up of 96 SPUs, 32 TAUs, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340		69 Watts
GeForce 8800 GTS (G80) 320MB		143 Watts
	Difference: 74 Watts (107%)

Memory Bandwidth

Theoretically, the GeForce 8800 GTS (G80) 320MB should perform a bit faster than the GeForce GT 340 overall. (explain)

GeForce 8800 GTS (G80) 320MB		63360 MB/sec
GeForce GT 340		54400 MB/sec
	Difference: 8960 (16%)

Texel Rate

The GeForce 8800 GTS (G80) 320MB should be a lot (about 40%) more effective at AF than the GeForce GT 340. (explain)

GeForce 8800 GTS (G80) 320MB		24624 Mtexels/sec
GeForce GT 340		17600 Mtexels/sec
	Difference: 7024 (40%)

Pixel Rate

The GeForce 8800 GTS (G80) 320MB should be much (approximately 133%) better at FSAA than the GeForce GT 340, and also should be capable of handling higher resolutions while still performing well. (explain)

GeForce 8800 GTS (G80) 320MB		10260 Mpixels/sec
GeForce GT 340		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 (in units of MB per second) that can be moved past the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher 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 texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core 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 rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.