GeForce 825M vs GeForce GTX 860M

Intro

Compare that to the GeForce GTX 860M, which features clock speeds of 797 MHz on the GPU, and 1000 MHz on the 4096 MB of GDDR5 memory. It features 1152 SPUs along with 96 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 825M		33 Watts
GeForce GTX 860M		45 Watts
	Difference: 12 Watts (36%)

Memory Bandwidth

In theory, the GeForce GTX 860M should perform quite a bit faster than the GeForce 825M overall. (explain)

GeForce GTX 860M		64000 MB/sec
GeForce 825M		14400 MB/sec
	Difference: 49600 (344%)

Texel Rate

The GeForce GTX 860M should be much (approximately 463%) more effective at texture filtering than the GeForce 825M. (explain)

GeForce GTX 860M		76512 Mtexels/sec
GeForce 825M		13600 Mtexels/sec
	Difference: 62912 (463%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 860M is superior to the GeForce 825M, and very much so. (explain)

GeForce GTX 860M		12752 Mpixels/sec
GeForce 825M		6800 Mpixels/sec
	Difference: 5952 (88%)

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 data (in units of megabytes per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the interface width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 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 anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This number 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 card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.