¿Installing RHEL 6 without Hardware Certification?

Hello everyone, one discussion-forum newbie here.

I am going to acquire an used Dell Precision 490 with two Intel Xeon E5345 (4x 2,33Ghz each processor) with 16GB DDR2 RAM as KVM Virtualization host for a production environment in a 50 users school. I know it's an old hardware, but it's cheap enough and it's ok for the price.

I've checked that the Dell Precision 490 is hardware-certified for RHEL 5 64bit and RHEL 4.3 64bit. I want to install RHEL 6.5 as native OS, and then run KVM VMs in it (not RHEV in any way, just group-install VH Host platform). If the hardware is not certified, will RHEL 6.5 run if I install it? In other words, is hardware certification a must, or just a way to be sure that it will run with no troubles at all?

Intel Xeon E5345 does have VT-X capabilities, and this server been used as VM host with VMWare in the past, so I think there woudn't be any troubles, but I want to be sure before purchasing it.

Thank you very much,

As English is not my native language, please excuse typing errors,

Jorge Garcia