A True Review posted a review on SLi/Crossfire Ready PSUs

Back in the old days, for most people the power supply was an after thought when building a computer. Though having a good PSU has always been important, you really never had to worry about compatibility when it comes to power supplies. Power rating aside; as long as it was ATX and had plenty of Molex connections, you were good to go. Fast forward to today where RAID SATA drive setups and dual graphic cards are the staple of a premium computer system, choosing a PSU that supplies enough juice and is equipped with the latest standards is undeniably important to insure the compatibility and potential growth of your system. Of course, when I say the latest standards I am referring to the ATX 2.0 compliancy as well as being SLi/Crossfire ready.

SLi/Crossfire Ready PSUs