GeForce 8800 GTS (G80) 640MB vs GeForce 9500 GT 512MB GDDR3

Intro

Compare those specs to the GeForce 9500 GT 512MB GDDR3, which has GPU clock speed of 550 MHz, and 512 MB of GDDR3 RAM running at 800 MHz through a 128-bit bus. It also is comprised of 32 Stream Processors, 16 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9500 GT 512MB GDDR3		50 Watts
GeForce 8800 GTS (G80) 640MB		143 Watts
	Difference: 93 Watts (186%)

Memory Bandwidth

Performance-wise, the GeForce 8800 GTS (G80) 640MB should theoretically be quite a bit better than the GeForce 9500 GT 512MB GDDR3 in general. (explain)

GeForce 8800 GTS (G80) 640MB		63360 MB/sec
GeForce 9500 GT 512MB GDDR3		25600 MB/sec
	Difference: 37760 (148%)

Texel Rate

The GeForce 8800 GTS (G80) 640MB should be quite a bit (about 180%) faster with regards to AF than the GeForce 9500 GT 512MB GDDR3. (explain)

GeForce 8800 GTS (G80) 640MB		24624 Mtexels/sec
GeForce 9500 GT 512MB GDDR3		8800 Mtexels/sec
	Difference: 15824 (180%)

Pixel Rate

The GeForce 8800 GTS (G80) 640MB is quite a bit (more or less 133%) more effective at full screen anti-aliasing than the GeForce 9500 GT 512MB GDDR3, and will be able to handle higher resolutions more effectively. (explain)

GeForce 8800 GTS (G80) 640MB		10260 Mpixels/sec
GeForce 9500 GT 512MB GDDR3		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: Memory bandwidth is the max amount of information (in units of megabytes per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory speed. If the card has DDR RAM, the result 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 anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total texture units by the core speed of the chip. The higher the texel rate, 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 could possibly record to its local memory in a second - measured in millions of pixels per second. The figure 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 fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.