Use > 4 GB of RAM. 4 GB can be addressed directly by the 32-bit edition of X-Ways Forensics under 64-bit Windows, 3 GB under 32-bit Windows. More RAM in 32 bit still helps indirectly thanks to caching in Windows. The 64-bit edition can use much more memory directly, of course. The more RAM can be used directly, the larger volume snapshots are supported (i.e. evidence objects with millions of files), the more evidence objects with large volume snapshots can be open at the same time, the more data of a volume snapshot can be held in memory and the more search hits can be maintained.