I am trying to setup a single machine to run both ESX and Hyper-V. I have a old PERC 5i sitting around and decided to setup a basic RAID 5 with 3 SATA drives to hold the VMs. I have a ASUS Z97 Sabertooth Mark 2 mobo with a PCIe 2.0 x16 slot. I insert the PERC card and turn on the machine it never comes up and keeps booting, no error messages. I think PERC 5i is a PCIe 1.0 card, but the interface should be backward compatible. Any ideas on what I may be missing here.