Is the Seasonic SS-660XP2 enough for a highly overclocked 780 and 2500k?

the seasonic 660w is more than a decent unit... that out of the way... it has a 55amp 12v rail.

I have a evga 780 classy that i would like to push to 1.3v on the core which should roughy equal out to 468w max theoretical load, never mind the core speed, likely 1.35ghz+

I have a 2500k that is currently at 1.356v load 1.392v idle 4.6ghz.

Any power supply gurus out there think i would have any headroom? If i were just going for modest overclocks on the 780 i would think its more than enough but if down the road i want to block my cpu and gpu and be at 5.0ghz/1.5ghz respectively, i just dont know.

I mean, $80 for a 80 plus platinum 660w seasonic... cmon.
www.newegg.com/Product/Product.aspx?Item=N82E16817151121
 
Im looking around and for 2500k's at around 1.35v most are reporting 155-170watts under prime/ibt, at 1.38v they are reporting 170-195w. so that should equal out to roughly 13amps to 16amps.... right?

I obviously have a whole system too, in my sig but that shouldn't be any more than im guessing 100w if all the items powered are spinning/running 100% at the same time plus all my usb ports powering something etc...... right? I have 4 quiet 120mm 1000rpm case fans too.
 
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Deleted member 217926

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Plenty of power. I just ordered one for my overclocked 2600K, GTX 780 SC setup and I'm probably going to leave my GTX 460 1GB in as a PhysX card.

Unfortunately I missed the great deal. I ordered last week for $135. :(