GeForce 8400 GS 512MB vs GeForce 930M

Intro

Compare all that to the GeForce 930M, which uses a 28 nm design. nVidia has set the core frequency at 928 MHz. The DDR3 memory works at a speed of 900 MHz on this particular model. It features 384 SPUs as well as 24 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the GeForce 930M should perform quite a bit faster than the GeForce 8400 GS 512MB in general. (explain)

GeForce 930M		14400 MB/sec
GeForce 8400 GS 512MB		6400 MB/sec
	Difference: 8000 (125%)

Texel Rate

The GeForce 930M will be quite a bit (more or less 328%) better at AF than the GeForce 8400 GS 512MB. (explain)

GeForce 930M		22272 Mtexels/sec
GeForce 8400 GS 512MB		5200 Mtexels/sec
	Difference: 17072 (328%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce 930M is the winner, by a large margin. (explain)

GeForce 930M		7424 Mpixels/sec
GeForce 8400 GS 512MB		2600 Mpixels/sec
	Difference: 4824 (186%)

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 (counted in megabytes per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the bus width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total texture units by the core clock 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 processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka 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 - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.