On Fri, 12 Nov 2010, John R Pierce wrote: > To: CentOS mailing list <centos at centos.org> > From: John R Pierce <pierce at hogranch.com> > Subject: Re: [CentOS] Memtest86+ running time > > On 11/12/10 10:46 AM, Keith Roberts wrote: >> >> I have a sneaking suspicion that it's the mismatched low and >> high density memory modules that are the problem? > > that sounds quite likely. some of those modules have two banks on the > single module, and I seriously doubt a system is going to like a single > bank and a dual bank module in a dual channel environment. > > I got in the habit a long time ago of *always* using > matched memory modules. I've learnt my lesson now John. Well at least I won't mix hi and lo density modules again. Here's the link for my Asrock m/b: http://www.crucial.com/uk/store/listparts.aspx?model=K7S8XE%20R3.0 It does not support dual channel memory. I'll keep y'all posted on the outcome of this saga :) Kind Regards, KR