GeForce 825M vs GeForce 8800 GT 512MB

Intro

Compare all of that to the GeForce 8800 GT 512MB, which comes with clock speeds of 600 MHz on the GPU, and 900 MHz on the 512 MB of GDDR3 memory. It features 112 SPUs as well as 56 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 825M		33 Watts
GeForce 8800 GT 512MB		105 Watts
	Difference: 72 Watts (218%)

Memory Bandwidth

Performance-wise, the GeForce 8800 GT 512MB should in theory be quite a bit superior to the GeForce 825M overall. (explain)

GeForce 8800 GT 512MB		57600 MB/sec
GeForce 825M		14400 MB/sec
	Difference: 43200 (300%)

Texel Rate

The GeForce 8800 GT 512MB should be quite a bit (approximately 147%) more effective at AF than the GeForce 825M. (explain)

GeForce 8800 GT 512MB		33600 Mtexels/sec
GeForce 825M		13600 Mtexels/sec
	Difference: 20000 (147%)

Pixel Rate

The GeForce 8800 GT 512MB should be a lot (about 41%) better at anti-aliasing than the GeForce 825M, and also capable of handling higher resolutions while still performing well. (explain)

GeForce 8800 GT 512MB		9600 Mpixels/sec
GeForce 825M		6800 Mpixels/sec
	Difference: 2800 (41%)

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 maximum amount of data (in units of megabytes per second) that can be transported across the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.