You could run an i7 with 2 phases if you liked. Got nothing to do with power consumption. More phases=more finetune for overclockers aswell as more stable supply. But also larger inefficiency.
You would also be amazed I guess on how few phases most server MBs got...
This one is 6 phases for example:
http://www.rackmountpro.com/imagevie...LUS.jpg&type=0
Intels own Smackover X58 board is 6 phases aswell. Asus T6T is 4 phases I think. Asus TEB-D is 5 phases. Flextronics TX65H is 5. MSI MS9199 is 3 or 4.
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