Here is a C3000 chassi with 8 blades, 2x G6, 2x G7 and 4x Gen8 servers, all except Gen8 have dual cpu.
Though my PSU´s are quite old, if you get PSUs from say a gen8 or something they will be more efficent, and you can powercap etc aswell.
However they are quite loud, and i would defentiely...
So long story short, i got a hold of a cheap P2000 G3 box, dual FC controllers, thought that would be a great fit with the D2700 shelf i already had, so i could finally make a HA cluster out of my two servers.
I seem to have some issues though, in the P2000 i got 12x 15k 3,5 300GB sas drives...