GeForce 8600 GT 1GB GDDR3 vs GeForce 920M

Intro

Compare those specs to the GeForce 920M, which has clock speeds of 954 MHz on the GPU, and 900 MHz on the 2048 MB of DDR3 memory. It features 384 SPUs along with 32 Texture Address Units and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce 8600 GT 1GB GDDR3, in theory, should perform much faster than the GeForce 920M overall. (explain)

GeForce 8600 GT 1GB GDDR3		22400 MB/sec
GeForce 920M		14400 MB/sec
	Difference: 8000 (56%)

Texel Rate

The GeForce 920M is much (about 253%) more effective at AF than the GeForce 8600 GT 1GB GDDR3. (explain)

GeForce 920M		30528 Mtexels/sec
GeForce 8600 GT 1GB GDDR3		8640 Mtexels/sec
	Difference: 21888 (253%)

Pixel Rate

The GeForce 920M is quite a bit (more or less 77%) more effective at anti-aliasing than the GeForce 8600 GT 1GB GDDR3, and also will be able to handle higher resolutions while still performing well. (explain)

GeForce 920M		7632 Mpixels/sec
GeForce 8600 GT 1GB GDDR3		4320 Mpixels/sec
	Difference: 3312 (77%)

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 largest amount of information (in units of MB per second) that can be transported past the external memory interface within a second. It's worked out by multiplying the bus width by its memory speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better 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 are processed per second. This number is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

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