GeForce 8600 GT 1GB GDDR3 vs GeForce 920M

Intro

Compare all of that to the GeForce 920M, which has a clock frequency of 954 MHz and a DDR3 memory speed of 900 MHz. It also makes use of a 64-bit bus, and makes use of a 28 nm design. It features 384 SPUs, 32 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce 8600 GT 1GB GDDR3 should perform quite a bit faster than the GeForce 920M in general. (explain)

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

Texel Rate

The GeForce 920M will be quite a bit (approximately 253%) better at anisotropic filtering 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 much (more or less 77%) faster with regards to full screen anti-aliasing than the GeForce 8600 GT 1GB GDDR3, and able to handle higher screen resolutions better. (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 max amount of information (counted in MB per second) that can be transferred across the external memory interface in one second. It is calculated by multiplying the bus width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 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 anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour 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 is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.