GeForce 825M vs GeForce GTX 950M

Intro

Compare those specs to the GeForce GTX 950M, which makes use of a 28 nm design. nVidia has set the core frequency at 914 MHz. The DDR3 RAM works at a speed of 1000 MHz on this specific model. It features 640 SPUs as well as 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 825M		33 Watts
GeForce GTX 950M		55 Watts
	Difference: 22 Watts (67%)

Memory Bandwidth

Theoretically, the GeForce GTX 950M should perform quite a bit faster than the GeForce 825M overall. (explain)

GeForce GTX 950M		32000 MB/sec
GeForce 825M		14400 MB/sec
	Difference: 17600 (122%)

Texel Rate

The GeForce GTX 950M is much (more or less 169%) more effective at texture filtering than the GeForce 825M. (explain)

GeForce GTX 950M		36560 Mtexels/sec
GeForce 825M		13600 Mtexels/sec
	Difference: 22960 (169%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 950M is superior to the GeForce 825M, by a large margin. (explain)

GeForce GTX 950M		14624 Mpixels/sec
GeForce 825M		6800 Mpixels/sec
	Difference: 7824 (115%)

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 max amount of information (counted in MB per second) that can be transported across the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.