GeForce 825M vs GeForce GTX 260 216SP 55 nm

Intro

Compare all that to the GeForce GTX 260 216SP 55 nm, which has core speeds of 576 MHz on the GPU, and 999 MHz on the 896 MB of GDDR3 memory. It features 216 SPUs as well as 72 TAUs and 28 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 825M		33 Watts
GeForce GTX 260 216SP 55 nm		171 Watts
	Difference: 138 Watts (418%)

Memory Bandwidth

The GeForce GTX 260 216SP 55 nm, in theory, should be quite a bit faster than the GeForce 825M in general. (explain)

GeForce GTX 260 216SP 55 nm		111888 MB/sec
GeForce 825M		14400 MB/sec
	Difference: 97488 (677%)

Texel Rate

The GeForce GTX 260 216SP 55 nm should be much (approximately 205%) more effective at texture filtering than the GeForce 825M. (explain)

GeForce GTX 260 216SP 55 nm		41472 Mtexels/sec
GeForce 825M		13600 Mtexels/sec
	Difference: 27872 (205%)

Pixel Rate

The GeForce GTX 260 216SP 55 nm is a lot (more or less 137%) more effective at anti-aliasing than the GeForce 825M, and also capable of handling higher resolutions more effectively. (explain)

GeForce GTX 260 216SP 55 nm		16128 Mpixels/sec
GeForce 825M		6800 Mpixels/sec
	Difference: 9328 (137%)

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 data (measured in megabytes per second) that can be moved across the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total number of 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics 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 number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.