I used this one: http://tweakers.net/pricewatch/19866....html#tab:info

Still running fine btw, although I've been using my desktop very, very little lately. I've completely switched over to using my laptop.
When Bitcoin mining was decently profitable, I was running 2 5870s and 1 5850 overclocked 24/7 for several weeks on the modded PSU just fine though