GeForce 8400 GS 512MB vs GeForce 920M

Intro

Compare all that to the GeForce 920M, which has GPU clock speed of 954 MHz, and 2048 MB of DDR3 RAM set to run at 900 MHz through a 64-bit bus. It also features 384 Stream Processors, 32 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce 920M should in theory be a lot faster than the GeForce 8400 GS 512MB in general. (explain)

GeForce 920M		14400 MB/sec
GeForce 8400 GS 512MB		6400 MB/sec
	Difference: 8000 (125%)

Texel Rate

The GeForce 920M is quite a bit (approximately 487%) faster with regards to texture filtering than the GeForce 8400 GS 512MB. (explain)

GeForce 920M		30528 Mtexels/sec
GeForce 8400 GS 512MB		5200 Mtexels/sec
	Difference: 25328 (487%)

Pixel Rate

The GeForce 920M will be a lot (about 194%) more effective at full screen anti-aliasing than the GeForce 8400 GS 512MB, and also will be able to handle higher screen resolutions more effectively. (explain)

GeForce 920M		7632 Mpixels/sec
GeForce 8400 GS 512MB		2600 Mpixels/sec
	Difference: 5032 (194%)

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 (counted in MB per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory speed. In the case of 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 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 number of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total 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 in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.