It relies on new fast data transfer mechanisms within PCI Express.
This can be noted by the one or two small RAM chips on these cards, which usually have a 32-bit or 64-bit bus to the GPU.
This small local memory caches the most often needed data for quicker access, somewhat remedying the inherently high-latency connection to system RAM.
The local and system memory areas are not noticeably separate to the user and often HyperMemory solutions are advertised as having as much as 4096 MB RAM when this is actually referring to the potential use of system RAM.
The solution offers excellent performance for 2D acceleration tasks while also maintaining adequate memory speed capable of playing some modern 3D game titles with reduced quality.