That looks fun. I have no experience with AMD but have been meaning to give them a try.
Thanks for that warning.
Speaking of cooling, those Dells have 7 screaming fans. They really blow. And they're REALLY LOUD! Multiplied by 3. They sat behind me for the duration of their configuration, about 10 days. You will have to speak louder, I'm now partially deaf.
(And I thought my home file server was noisy with 4 HD coolers and misc fans.)
Sure could hear the quiet when the breakers blew. (The breakers blew twice here at home when I was compiling Gentoo on all three boxes. My 650 watt UPS powered them along for literally 5 seconds before it gave up in disgust. LOL, that really sucked!)
That's no longer an issue or it isn't an issue with the right setup. We researched a number of issues for a couple of weeks, especially the cooling issues but our concerns were laid to rest. The SuperKool technology keeps the 1u boxes cool - the 2,3 and 4u units stay about the same temperature.
Four years ago I had this setup at home. After too many warm days we moved to a real data center with redundant everything. Heat has always been an issue for us but we're no longer concerned with the AMDs.