GeForce 825M vs GeForce 8600 GT 1GB GDDR3

Intro

Compare all of that to the GeForce 8600 GT 1GB GDDR3, which uses a 80 nm design. nVidia has clocked the core frequency at 540 MHz. The GDDR3 memory works at a frequency of 700 MHz on this model. It features 32 SPUs along with 16 TAUs and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 825M		33 Watts
GeForce 8600 GT 1GB GDDR3		47 Watts
	Difference: 14 Watts (42%)

Memory Bandwidth

Performance-wise, the GeForce 8600 GT 1GB GDDR3 should theoretically be much better than the GeForce 825M overall. (explain)

GeForce 8600 GT 1GB GDDR3		22400 MB/sec
GeForce 825M		14400 MB/sec
	Difference: 8000 (56%)

Texel Rate

The GeForce 825M should be quite a bit (approximately 57%) more effective at texture filtering than the GeForce 8600 GT 1GB GDDR3. (explain)

GeForce 825M		13600 Mtexels/sec
GeForce 8600 GT 1GB GDDR3		8640 Mtexels/sec
	Difference: 4960 (57%)

Pixel Rate

The GeForce 825M will be a lot (more or less 57%) more effective at AA than the GeForce 8600 GT 1GB GDDR3, and also will be capable of handling higher resolutions more effectively. (explain)

GeForce 825M		6800 Mpixels/sec
GeForce 8600 GT 1GB GDDR3		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: Memory bandwidth is the maximum amount of data (counted in MB per second) that can be transferred past the external memory interface within a second. The number is calculated by multiplying the bus width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's 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 amount of texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the clock 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 lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.