I think the issue is that the board just cant muscle enough power for any higher OC. A 720 @ stock is a 95w TDP but @ 3.6 and 1.2vcore has a 122W TDP. Most likely you are running a higher vcore than 1.2vcore for 3.5. That is one of the reasons I have not yet upgraded.
Enjoying the topic, anyone here ever been able to stabilize the HTT over 270mhz?
I do not regret to have done the upgrade to the Phenom II, at 3500Mhz he has a fantastic performance and presents no problem and apart from everything I have a great economy in not having to replace the motherboard.
Edited by ninjjah - 6/25/09 at 12:40pm