GeForce 810M vs GeForce 825M

Intro

Compare all that to the GeForce 825M, which makes use of a 28 nm design. nVidia has set the core frequency at 850 MHz. The DDR3 RAM runs at a frequency of 900 MHz on this specific card. It features 384 SPUs as well as 16 Texture Address Units and 8 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 810M		15 Watts
GeForce 825M		33 Watts
	Difference: 18 Watts (120%)

Memory Bandwidth

Both cards have exactly the same bandwidth, so in theory they should have identical performance. (explain)

Texel Rate

The GeForce 825M should be a lot (about 130%) more effective at AF than the GeForce 810M. (explain)

GeForce 825M		13600 Mtexels/sec
GeForce 810M		5904 Mtexels/sec
	Difference: 7696 (130%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce 825M is superior to the GeForce 810M, by far. (explain)

GeForce 825M		6800 Mpixels/sec
GeForce 810M		2952 Mpixels/sec
	Difference: 3848 (130%)

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 (measured in megabytes per second) that can be moved across the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs 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 output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.