I wouldn't even attempt it.
It MAY work , but it just is not worth the trouble if it doesn't , you'll be looking at everything else but the PSU for stuff like restarting , locking up , funky fan readings crap like that.
If your gonna go with a powerfull board chip and Video card , you should IMHO over power it like I did with a 550Watt.
OR
You can get a 430Watt tru power Antec at newegg for a good price or even at Comp USA for that matter , this is as low as I would try to go.
You can however save the money you spend on the PSU on RAM by buying 3200 at Crucial , its semi cheep ram but it performs very well on this board , just use the motherboard ram finder on their main site , it shows the ram they tested with any certian board. And then down the road upgrade the ram to better stuff.
You may NOT be able to run it on the overclocked settings though till you do , but its plenty fast enough anyways.
good luck
Just my opnion BTW some opnions may differ. =)