Just on another front, the 3xxx series BIOS's for the M4E boards absolutely suck - they basically were updated to support Ivy Bridge chips but that screwed the Sandy Bridge support (less stable overclocks using more vcore etc) - use the highest numbe...
I have 30 x MVF boards in data centres around the world running 5.0Ghz+ overclocks. This issue costs me 300 euros per HOUR (more than what each board is worth) every time it fails - just this morning I have spent 2 hours on the phone with a datacentr...