GeForce 825M vs GeForce 9400 GT 256MB

Intro

Compare those specs to the GeForce 9400 GT 256MB, which has a core clock speed of 550 MHz and a GDDR2 memory frequency of 400 MHz. It also uses a 128-bit memory bus, and uses a 65 nm design. It is comprised of 16 SPUs, 8 Texture Address Units, and 4 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 825M		33 Watts
GeForce 9400 GT 256MB		50 Watts
	Difference: 17 Watts (52%)

Memory Bandwidth

As far as performance goes, the GeForce 825M should in theory be a small bit better than the GeForce 9400 GT 256MB overall. (explain)

GeForce 825M		14400 MB/sec
GeForce 9400 GT 256MB		12800 MB/sec
	Difference: 1600 (13%)

Texel Rate

The GeForce 825M will be much (about 209%) faster with regards to texture filtering than the GeForce 9400 GT 256MB. (explain)

GeForce 825M		13600 Mtexels/sec
GeForce 9400 GT 256MB		4400 Mtexels/sec
	Difference: 9200 (209%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce 825M is superior to the GeForce 9400 GT 256MB, and very much so. (explain)

GeForce 825M		6800 Mpixels/sec
GeForce 9400 GT 256MB		2200 Mpixels/sec
	Difference: 4600 (209%)

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 (counted in megabytes per second) that can be moved over the external memory interface in one second. It is calculated by multiplying the bus width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better 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 in one second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, 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 the video card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.