GeForce 825M vs GeForce GTX 960M

Intro

Compare those specs to the GeForce GTX 960M, which has a core clock speed of 1096 MHz and a GDDR5 memory speed of 1000 MHz. It also uses a 128-bit bus, and makes use of a 28 nm design. It is made up of 640 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 825M		33 Watts
GeForce GTX 960M		65 Watts
	Difference: 32 Watts (97%)

Memory Bandwidth

In theory, the GeForce GTX 960M should perform a lot faster than the GeForce 825M overall. (explain)

GeForce GTX 960M		64000 MB/sec
GeForce 825M		14400 MB/sec
	Difference: 49600 (344%)

Texel Rate

The GeForce GTX 960M will be quite a bit (approximately 222%) better at texture filtering than the GeForce 825M. (explain)

GeForce GTX 960M		43840 Mtexels/sec
GeForce 825M		13600 Mtexels/sec
	Difference: 30240 (222%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 960M is the winner, and very much so. (explain)

GeForce GTX 960M		17536 Mpixels/sec
GeForce 825M		6800 Mpixels/sec
	Difference: 10736 (158%)

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 (counted in megabytes per second) that can be transferred over the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, 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 calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.