We recently bought & self-assembled 7 identical dual LGA1366-based servers. All POST fine, but when I attempt to install Ubuntu Server 11.10 on them, 5 install perfectly. For the other 2, they install MUCH more slowly (e.g. 4-6 hours vs 15 minutes on the other 5 nodes) and upon reboot also are extremely sluggish.
Temperatures are comparable to the other 5 nodes, all RAM is recognized fine. I've tried swapping out hard drives and RAM, and even returned the motherboards for a replacement, but to no avail. I'm out of ideas as to what the problem might be -- any suggestions would be greatly appreciated. Thanks!