GeForce 825M vs GeForce GT 130

Intro

Compare all that to the GeForce GT 130, which has GPU clock speed of 500 MHz, and 768 MB of DDR2 RAM running at 250 MHz through a 192-bit bus. It also is made up of 48 SPUs, 24 Texture Address Units, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 825M		33 Watts
GeForce GT 130		75 Watts
	Difference: 42 Watts (127%)

Memory Bandwidth

As far as performance goes, the GeForce 825M should in theory be a little bit superior to the GeForce GT 130 overall. (explain)

GeForce 825M		14400 MB/sec
GeForce GT 130		12000 MB/sec
	Difference: 2400 (20%)

Texel Rate

The GeForce 825M will be a little bit (more or less 13%) faster with regards to anisotropic filtering than the GeForce GT 130. (explain)

GeForce 825M		13600 Mtexels/sec
GeForce GT 130		12000 Mtexels/sec
	Difference: 1600 (13%)

Pixel Rate

The GeForce GT 130 should be just a bit (more or less 18%) better at anti-aliasing than the GeForce 825M, and should be capable of handling higher resolutions without losing too much performance. (explain)

GeForce GT 130		8000 Mpixels/sec
GeForce 825M		6800 Mpixels/sec
	Difference: 1200 (18%)

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 MB per second) that can be transported past the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the graphics 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 the video card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines 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 also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.