GeForce 810M vs GeForce 9400 GT 256MB

Intro

Compare those specs to the GeForce 9400 GT 256MB, which features a clock speed of 550 MHz and a GDDR2 memory speed of 400 MHz. It also makes use of a 128-bit memory bus, and makes use of a 65 nm design. It features 16 SPUs, 8 Texture Address Units, and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 810M		15 Watts
GeForce 9400 GT 256MB		50 Watts
	Difference: 35 Watts (233%)

Memory Bandwidth

Theoretically speaking, the GeForce 810M should perform just a bit faster than the GeForce 9400 GT 256MB overall. (explain)

GeForce 810M		14400 MB/sec
GeForce 9400 GT 256MB		12800 MB/sec
	Difference: 1600 (13%)

Texel Rate

The GeForce 810M should be a lot (about 34%) faster with regards to texture filtering than the GeForce 9400 GT 256MB. (explain)

GeForce 810M		5904 Mtexels/sec
GeForce 9400 GT 256MB		4400 Mtexels/sec
	Difference: 1504 (34%)

Pixel Rate

The GeForce 810M will be a lot (more or less 34%) more effective at full screen anti-aliasing than the GeForce 9400 GT 256MB, and also able to handle higher resolutions more effectively. (explain)

GeForce 810M		2952 Mpixels/sec
GeForce 9400 GT 256MB		2200 Mpixels/sec
	Difference: 752 (34%)

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 (measured in megabytes per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory speed. In the case of DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the card's 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 fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.