Nonsense. I have the 1090t on an ASUS Crosshair IV with all six cores at 4.4 with 8 gig of Corsair Dominator rated at 7-7-7-20 1333 and it works fine at 1.9 volts 1600. The old Phenom limits do not apply to this chip.
The memory controller might have been upgraded in the c3 revision phenomII . The memory controller officially supports
As you can see, not much has changed, but it does seem to be for the better. I want to put emphasis on the fact that it now supports four DIMMs at 1333MHz officially instead of two, so it looks like the memory controller has been upgraded. http://www.neoseeker.com/Articles/Hardware/Reviews/pii_...
Anything above that is going to be on a user basis, because its overclocking beyond 'official' specifications.