Yea that's pretty much what we have been saying is that 4.4-4.6 is ok, but anything higher isn't depending on cooling. They mentioned in the first page that 4.9 was hitting the thermal envelope easily at only 1.35v. I can do 4.8 on my H50 single fan setup and will top out at 75c with higher volts. Just shows the difference between SB and IB though, and how much heat those tri-gates really produce. As I believe SB also uses TIM internally between the cores and IHS. They also didn't mention ambient temps which is a big no no when doing these kinds of reviews.