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 ++++++++++++++++++++++++++++++++++++++++