I too wanted to use UEFI on my new Dell Precision T3600 workstation, but I found that several recent Linux Distributions all had problems installing or running correctly once installed with UEFI enabled. I finally gave up and reenabled BIOS based booting so I could use the PERC card and get some work done. We've also seen a lot of issues getting things set just right on some IBM x3650 servers so we even have a chance at performing remote management in various problem scenarios.