GeForce 920M vs GeForce 9400 GT 256MB

Intro

Compare all of that to the GeForce 9400 GT 256MB, which uses a 65 nm design. nVidia has set the core speed at 550 MHz. The GDDR2 memory runs at a frequency of 400 MHz on this model. It features 16 SPUs as well as 8 Texture Address Units and 4 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce 920M, in theory, should perform a bit faster than the GeForce 9400 GT 256MB in general. (explain)

GeForce 920M		14400 MB/sec
GeForce 9400 GT 256MB		12800 MB/sec
	Difference: 1600 (13%)

Texel Rate

The GeForce 920M will be a lot (approximately 594%) more effective at AF than the GeForce 9400 GT 256MB. (explain)

GeForce 920M		30528 Mtexels/sec
GeForce 9400 GT 256MB		4400 Mtexels/sec
	Difference: 26128 (594%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce 920M is superior to the GeForce 9400 GT 256MB, by a large margin. (explain)

GeForce 920M		7632 Mpixels/sec
GeForce 9400 GT 256MB		2200 Mpixels/sec
	Difference: 5432 (247%)

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 information (in units of megabytes per second) that can be transported across the external memory interface in a second. The number is calculated by multiplying the interface width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 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, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs 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 fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.