Quote Originally Posted by Daveburt714 View Post

2) I'm having a really hard time getting my machine to boot with an HTRef of 300 or greater (practice for the 1055 ). Everytime I try to boot at a high HTRef my machine hangs at the Win7 splash screen,
and even worse, it has trashed my Video Card drivers a couple times requiring a "System Restore" to get things back.
I'm running a 4850/4870 Crossfire settup BTW...
Dave, just don't boot into windows whenever testing high ht refclock or high mem clocks/tight timings.

Whenever i do one of the above testing i always boot into memtest86 from a thumbdrive. (push F8 in postscreen and select bootable device)

This has save me many many headaches. Once i found settings that survive a number of loops of test 1,2,3 and maybe test 4, i'm brave enough to put my Windows install on the line.

When i'm testin ram i usuallly run test 1,2 and 3 cause they don't take long and then at least 3 loops of test 5.