uname -a is in the original message. See to be a problem with the board any memory I put in the black slots will fail with memtest.. damm I was hoping if the pc booted up with about that annoying memory beep - I was ok... I memtested and it failed On Mon, Sep 8, 2014 at 3:05 PM, Valeri Galtsev <galtsev at kicp.uchicago.edu> wrote: > > On Mon, September 8, 2014 1:50 pm, Bob Metelsky wrote: > > Its dual channel and they are in the right spot, I reseated them > > > > 1 pair in black > > 1 pair in white > > > > So are you guys saying my kernel should be supporting more than 4gb? > > > > BTW, what the command > > uname -a > > gives (sorry about trivial thing and if this has been checked already)? > > Valeri > > > > > > > On Mon, Sep 8, 2014 at 2:37 PM, <m.roth at 5-cent.us> wrote: > > > >> Jonathan Billings wrote: > >> > I cut out the text of dmidecode that weren't necessary for the point: > >> > > >> > On Mon, Sep 08, 2014 at 01:52:43PM -0400, Bob Metelsky wrote: > >> >> dime910 /home/robert :( # dmidecode -t 17 > >> >> # dmidecode 2.12 > >> >> SMBIOS 2.3 present. > >> >> > >> >> Handle 0x1100, DMI type 17, 27 bytes > >> >> Memory Device > >> >> Locator: DIMM_1 > >> >> Part Number: 64T256020EU2.5C2 > >> >> > >> >> Handle 0x1101, DMI type 17, 27 bytes > >> >> Memory Device > >> >> Locator: DIMM_3 > >> >> Part Number: CM2X2048-6400C5 > >> >> > >> >> Handle 0x1102, DMI type 17, 27 bytes > >> >> Memory Device > >> >> Locator: DIMM_2 > >> >> Part Number: CM2X2048-6400C5 > >> >> > >> >> Handle 0x1103, DMI type 17, 27 bytes > >> >> Memory Device > >> >> Locator: DIMM_4 > >> >> Part Number: 64T256020EU2.5C2 > >> > > >> > I couldn't find the Dell Service Manual for a 'Dell 770' but I was > >> > looking at the Service Manual for the Optiplex 760, and I saw that the > >> > way that the modules are paired isn't obvious. It looks like you've > >> > got 2 2G memory modules from 64T256020EU2.5C2 (Kingston?) and 2 2GB > >> > modules from CM2X2048-6400C5 (Corsair?). I suggest finding your > >> > service manual, and make sure that the modules are placed in the DIMM > >> > slots and the same vendor RAM is paired with its partner. > >> > > >> > It sounds to me like there might just be something weird going on with > >> > how the memory is installed. I'm assuming you don't have an > >> > artificial limit in the kernel command line or anything obvious like > >> > that. > >> > > >> Oh, Ghu.... I don't know about lower-end desktops, but in servers, they > >> *MUST* be *identical*, even to the point of not being able to mix dual > >> rank with quad rank, even if everything else is the same. > >> > >> mark > >> > >> _______________________________________________ > >> CentOS mailing list > >> CentOS at centos.org > >> http://lists.centos.org/mailman/listinfo/centos > >> > > _______________________________________________ > > CentOS mailing list > > CentOS at centos.org > > http://lists.centos.org/mailman/listinfo/centos > > > > > ++++++++++++++++++++++++++++++++++++++++ > Valeri Galtsev > Sr System Administrator > Department of Astronomy and Astrophysics > Kavli Institute for Cosmological Physics > University of Chicago > Phone: 773-702-4247 > ++++++++++++++++++++++++++++++++++++++++ > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos >