GeForce 920M vs GeForce 9800 GT 1GB

Intro

Compare those specs to the GeForce 9800 GT 1GB, which makes use of a 65/55 nm design. nVidia has set the core speed at 600 MHz. The GDDR3 memory runs at a speed of 900 MHz on this model. It features 112 SPUs along with 56 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce 9800 GT 1GB, in theory, should perform much faster than the GeForce 920M overall. (explain)

GeForce 9800 GT 1GB		57600 MB/sec
GeForce 920M		14400 MB/sec
	Difference: 43200 (300%)

Texel Rate

The GeForce 9800 GT 1GB should be just a bit (more or less 10%) better at texture filtering than the GeForce 920M. (explain)

GeForce 9800 GT 1GB		33600 Mtexels/sec
GeForce 920M		30528 Mtexels/sec
	Difference: 3072 (10%)

Pixel Rate

The GeForce 9800 GT 1GB should be a lot (approximately 26%) more effective at full screen anti-aliasing than the GeForce 920M, and also will be capable of handling higher resolutions more effectively. (explain)

GeForce 9800 GT 1GB		9600 Mpixels/sec
GeForce 920M		7632 Mpixels/sec
	Difference: 1968 (26%)

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 maximum amount of data (in units of megabytes per second) that can be transported across the external memory interface in a second. It is worked out by multiplying the interface width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the video 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 maximum number of pixels the video card could possibly write to its local memory in a 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 called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.