Is the C6220 a genuine Dell device?
I ask because I have a couple of C1100 which are (apparently) Quanta units, and having just had one die on me in a fail condition that isn't specified in the manual (Fault light solid on), I'm now a little nervous about these "low price no frills" servers from Dell, who I would normally trust very highly for reliability.
Another weirdness with my C1100 is I can't seem to properly fit a PCIE card, the riser is just too far away from the bracket, so to fit a card I had to remove the bracket - highly unusual.
When you buy a VW, you know you're not getting an Audi, but you know you benefit from the engineering expertise/resources that goes into the Audi because it's the same company. An old banger with a VW log glued on it is a whole different proposition.
I should point out I buy all my hardware 2nd hand out of service contracts, etc.