Will I have problems with this Power Supply if I go ASUS?

how about the Aerocool Zerodba 620W. the noise level is (according to some reviews) inaudiable at close proximity to the fan even while the system is under full load.

Ask ASUS. They'll know best.

(Don't bother with SLi though....waste of cash, especially as an upgrade)

I stand by my recommendation, however Mesa is right... Asus would know best.

However, if you aren't going to get the other card for SLI within 90 days of getting the first one, don't bother. The next card will be out and it alone will probably beat your 2 in SLI. If you change your mind and decide against SLI, the Aerocool Zerodba 500W would be suitable

I've got that combination, and the only hiccups are mine, and they for entirely unrelated reasons. The fan on that Fortron doesn't make much more noise than that of the motherboard, which, as you know, doesn't even exist.
Apropos that Fortron: That power supply carries a lot of cabling so you will need to manage it with more than a few cable ties to keep it all neatly and rationally routed within your case.

Awesome.. thanks for the info Slaw.

I am more doing it as a project.. I did water cooling back in 93 because it was fun and new.. SLI is the same crap.. i just want a project I can tweak and play with.