Yes, it is possible to replace PA-RISC cells with Itanium cells, but as the architecture isn't very recent, you cannot use very recent cells (or CPUs). The version with PA8800/8900 CPUs can be upgraded to a version with up to 1.6GHz Itanium CPU's. Kari On 1.10.2011 17:54, Brian Hechinger wrote: You should be able to replace the CPUs with uranium if you wanted to (and could find/afford uranium system boards) no? -brian On Oct 1, 2011, at 6:40, MG<marcogb at xs4all.nl> wrote: On 1-10-2011 11:45, Mark Wickens wrote: http://www.ebay.co.uk/itm/ws/eBayISAPI.dll?ViewItem&item=320767503311&a… If anyone here would seriously wish to spend that amount of money and has the electric requirements to run that at home: For what would, or could, one want to use it? Considering it's advertised as an HP 9000 (PA-RISC). For that price one could probably find an rx6600, for example and still have some money left to fill it at least half-way up with modern multi- core/threading processors. - MG .