Oese I haven't yet been able to test 1066 @ half dividers cause I've taken it apart just one more time.
But when it's up again I will check for you.
About the stress on the imc with 2gig modules, do you think the imc and htt controller are connected?
I mean will the 2gig modules cause the low max htt (305mhz x5) even @ low mem speeds just because the imc is having a hard time managing 2 gig sticks?
Can you give me the link of the forumdeluxx gigabyte thread?
It's nice to have some one with the same problem cause I really feel like with this brisbane! (2.88ghz is not stable in vista 64 )

3oh6 thanks for your info, when your ready to go for some more oc-ing, could you check your max htt speed with these sticks? just to check the above theory! Btw could a motherboard grounding issue also be able to cause this problem?(it's fully stable @ stock)

If it's true than I will be the first to run a Kuma dual core K10.