I've got a X2 3800+ that I'm running at 2.7 GHz (270 x 10) on a Asrock 939Dual-SATA2 and it is stable. Only problem is getting the mother booted when a SATA2 hard drive is used.
Actually, there appear to be issues with the implementation of the SATA2 controller/driver as well.
Please see my post here:
http://www.hardforum.com/showpost.php?p=1028482972&postcount=154
and help if you can.
No one is sure if the issue with 1.30 is a bug in this version of the BIOS or an actual lock implemented by ASROCK.
You can install either the OCWB1 or OCWB2 BIOS versions which will give you the 1T option. They are beta though.
I've mentioned this in other threads, but wanted to start a new one to hopefully solve this issue.
I've read about others having "cold boot issues" and most of the posts talk about the system not even posting. I am able to POST, but Windows won't load without multiple presses of the reset...