Hi Len: Thanks for all information. I forgot two possible problems: it deals of a workstation for very heavy computation (quantum mechanical), not a server. Although I'll benefit of full property (not having to share cpu time with colleagues, such as in the institution) it will be at the very low limit to accomplish part of my tasks. Therefore, what about the usb connection to the APC apparatus? usb makes use of the cpu and because of this it has a bad repution in our quarters (read scsi by far preferred): how much it will detract from the performance?
Second problem: voltage surge from lightnings, which may occur because the ws will also run unattended. As far as i know, back-ups do not provide any reliable barrier. I remember vaguely that any computer should by default be provided of varistors to block voltage surge from lightnings. Is it correct? In particular do you know if Enermax case has bu default real varistors and efficiently connected (there were once upon a time controversial views how many varistors, how coccected, and if they are real or not). I hope these questions are of general interest. They concern the safety of expensive machines and extensive work by the user. Regards francesco On Monday 15 May 2006 15:00, Lennart Sorensen wrote: > On Sat, May 13, 2006 at 06:14:59PM +0200, Francesco Pietra wrote: > > I forgot to mention that for my two amd64 dual opterons set the > > transformer is 600W. Would the 540W of APC BACK-UPS RS 800VA be enough? > > The 1000W model is priced 470 euros in Italy. > > Well a system is amost never using the full capacity of the power > supply. So it really depends what is in the system. The 800VA might be > a bit small for a server, but it depends. I run a desktop system of one > of the 800VAs, althought it might be a bit overkill for it (but it was > cheap so I got it). > > Len Sorensen -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
