yep they're boxed at least 2 are under warranty I believe with overclockers.co.uk.
They're run at 900/300 with fans on 100%. The reason the fan is 100% because I also have 2 other XFX 5870's that are faulty but I'm keeping them for spares (like the fan !) I can chuck these in as well if you want all 3.
Temps never go over 70, they're in a garage which is nice and cool
, quick SS for you, cards 2-5 are the 5870s:
Im a bit further south than you, hertfordshire, but we could meet somewhere in between