GeForce 825M vs GeForce 8600 GT 1GB DDR2

Intro

Compare all that to the GeForce 8600 GT 1GB DDR2, which features clock speeds of 540 MHz on the GPU, and 400 MHz on the 1024 MB of DDR2 RAM. It features 32 SPUs along with 16 TAUs and 8 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 825M		33 Watts
GeForce 8600 GT 1GB DDR2		47 Watts
	Difference: 14 Watts (42%)

Memory Bandwidth

The GeForce 825M should theoretically perform just a bit faster than the GeForce 8600 GT 1GB DDR2 overall. (explain)

GeForce 825M		14400 MB/sec
GeForce 8600 GT 1GB DDR2		12800 MB/sec
	Difference: 1600 (13%)

Texel Rate

The GeForce 825M will be much (approximately 57%) more effective at AF than the GeForce 8600 GT 1GB DDR2. (explain)

GeForce 825M		13600 Mtexels/sec
GeForce 8600 GT 1GB DDR2		8640 Mtexels/sec
	Difference: 4960 (57%)

Pixel Rate

The GeForce 825M will be quite a bit (about 57%) better at anti-aliasing than the GeForce 8600 GT 1GB DDR2, and also should be capable of handling higher resolutions without slowing down too much. (explain)

GeForce 825M		6800 Mpixels/sec
GeForce 8600 GT 1GB DDR2		4320 Mpixels/sec
	Difference: 2480 (57%)

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 (counted in megabytes per second) that can be moved across the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, 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 texture map elements (texels) that are processed per second. This number is calculated by multiplying the total texture units of the card 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 that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.