GeForce 825M vs GeForce 940M

Intro

Compare those specs to the GeForce 940M, which comes with a GPU core clock speed of 1072 MHz, and 2048 MB of DDR3 RAM running at 1000 MHz through a 64-bit bus. It also features 384 Stream Processors, 24 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce 940M should be 11% quicker than the GeForce 825M overall, due to its greater data rate. (explain)

GeForce 940M		16000 MB/sec
GeForce 825M		14400 MB/sec
	Difference: 1600 (11%)

Texel Rate

The GeForce 940M will be a lot (approximately 89%) faster with regards to AF than the GeForce 825M. (explain)

GeForce 940M		25728 Mtexels/sec
GeForce 825M		13600 Mtexels/sec
	Difference: 12128 (89%)

Pixel Rate

The GeForce 940M should be much (about 26%) more effective at anti-aliasing than the GeForce 825M, and also should be capable of handling higher resolutions more effectively. (explain)

GeForce 940M		8576 Mpixels/sec
GeForce 825M		6800 Mpixels/sec
	Difference: 1776 (26%)

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: Memory bandwidth is the largest amount of information (measured in MB per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the bus width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total texture units by the core clock 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 applied in a second.

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