GeForce 920M vs GeForce GTX 285 2GB

Intro

Compare those specifications to the GeForce GTX 285 2GB, which uses a 55 nm design. nVidia has set the core frequency at 648 MHz. The GDDR3 memory works at a frequency of 1242 MHz on this specific card. It features 240 SPUs along with 80 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the GeForce GTX 285 2GB should in theory be quite a bit better than the GeForce 920M overall. (explain)

GeForce GTX 285 2GB		158976 MB/sec
GeForce 920M		14400 MB/sec
	Difference: 144576 (1004%)

Texel Rate

The GeForce GTX 285 2GB should be quite a bit (approximately 70%) more effective at AF than the GeForce 920M. (explain)

GeForce GTX 285 2GB		51840 Mtexels/sec
GeForce 920M		30528 Mtexels/sec
	Difference: 21312 (70%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 285 2GB is a better choice, by a large margin. (explain)

GeForce GTX 285 2GB		20736 Mpixels/sec
GeForce 920M		7632 Mpixels/sec
	Difference: 13104 (172%)

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 max amount of data (in units of megabytes per second) that can be moved past the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics 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 amount of colour ROPs by the the core speed of the card. 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 many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.