We have a Dell R710 that had serious hardware issues last Friday evening. Dell replaced the mobo and processor, and the machine booted fine. The server runs Win2k8 R2 Server Core, and hosts 4 VMs, all Win2k8 R2. One of the VMs runs SQL Server 2008 R2. Storage is RAID10 SAS 15k.
I have a few benchmark queries for SQL server that take about 30 seconds to run. After the repairs from Friday, they now take about 60 seconds to run. I can't figure out what's causing the drop in performance. The configuration for everything has not changed, only the mobo and processor. Any ideas on what I should be looking at?