I am using Interlago CPU on H8DGT-HF with the latest BIOS from technical support, but CentOS 6.0 64bit can only recognize 3.4GB memory out of 64GB. Windows Server 2008 R2 SP1 64bit does not have such problem. Do you know how to fix it?
You need to use a Interlagos supported operating system. RHEL6.1 will get you that fixed. Or you can use latest Fedora, which is similar to CentOS. You can also recompiled CentOS 6.0 with the latest kernel 3.0.4.