GeForce 8800 GTS (G80) 640MB vs GeForce GTX 965M

Intro

Compare all of that to the GeForce GTX 965M, which features GPU clock speed of 944 MHz, and 2048 MB of GDDR5 RAM running at 1000 MHz through a 128-bit bus. It also is made up of 1024 Stream Processors, 64 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 965M		60 Watts
GeForce 8800 GTS (G80) 640MB		143 Watts
	Difference: 83 Watts (138%)

Memory Bandwidth

Theoretically, the GeForce GTX 965M should be a small bit faster than the GeForce 8800 GTS (G80) 640MB overall. (explain)

GeForce GTX 965M		64000 MB/sec
GeForce 8800 GTS (G80) 640MB		63360 MB/sec
	Difference: 640 (1%)

Texel Rate

The GeForce GTX 965M should be a lot (more or less 145%) better at anisotropic filtering than the GeForce 8800 GTS (G80) 640MB. (explain)

GeForce GTX 965M		60416 Mtexels/sec
GeForce 8800 GTS (G80) 640MB		24624 Mtexels/sec
	Difference: 35792 (145%)

Pixel Rate

The GeForce GTX 965M should be a lot (more or less 194%) faster with regards to AA than the GeForce 8800 GTS (G80) 640MB, and should be able to handle higher resolutions while still performing well. (explain)

GeForce GTX 965M		30208 Mpixels/sec
GeForce 8800 GTS (G80) 640MB		10260 Mpixels/sec
	Difference: 19948 (194%)

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 data (in units of MB per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the interface width by its memory speed. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also 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 reach the maximum fill rate.