GeForce 8400 GS 512MB vs GeForce 920M

Intro

Compare that to the GeForce 920M, which features a clock speed of 954 MHz and a DDR3 memory frequency of 900 MHz. It also makes use of a 64-bit memory bus, and makes use of a 28 nm design. It is made up of 384 SPUs, 32 TAUs, and 8 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the GeForce 920M should theoretically be much better than the GeForce 8400 GS 512MB overall. (explain)

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

Texel Rate

The GeForce 920M should be quite a bit (more or less 487%) better at AF 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 quite a bit (more or less 194%) better at anti-aliasing than the GeForce 8400 GS 512MB, and capable of handling higher screen resolutions better. (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: Bandwidth is the largest amount of data (measured in megabytes per second) that can be transferred past the external memory interface within a second. It is calculated by multiplying the interface width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better 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 number of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.