# ISO's include a boot menu that allows selection of the current version (4.0) and a previous version (3.5b). # See the list of enhancements for version 4.0 below for more details. * Multi-CPU Support! Multi-threaded for parallel testing of memory with up to 16 CPUs * Works with up to 64Gb of memory * Supports 32 and 64 bit CPUs * Supports all memory types (DDR, DDR2, DDR3) * Installable from all versions of Windows, Mac and Linux