It is an IBM X x3850 X6
No Bluescreen, just a disconnect and or lockup of VMs (4 x VMs , Win7x64 Win2003 Ent, Win 2008 x32, & 2012R2)All would randomly lock freeze, restart fine for 2-3 days lock again. I have moved them to a HP DL360 and they are all fine.
I have 2 RAID setup 4x900gb SAS RAID...