wheres HT at

?
Good job so far, but 1.5v for 4ghz, i think you need to tweak other voltages, thats too much vcore for that clock. I do 4.0 GHz @ 1.305v, raised it a tick to 1.317v for crunching, been crunching away ever since. By the way I raised it in fear of crashing, @ 1.305v i never had a reboot or bsod in about a little over a month.
HT is at the place where proccies run 10C hotter

Thing is, I ticked on a nifty little feature called "Load Line Balancing" just before I made a last test last night. That got me .02-.025 volts more compared to without LLB. I likes.
Concerning voltages, I BSOD'd with:
- CPU @ 200x20, 1.45(BIOS)v
- QPI @ x36, 1.340v
- RAM @ x6, 1.60v
- Uncore @ x13
I might get the IOH/ICH volts up, but I need to figure out what they do before messing with that.
To add to the board discussion, I think my Gigabyte EX58-UD3R does mighty fine.
Though I miss the auto-reset of OC values when boot fails (yeah, spoiled by Asus), but that's about all really.
Might not be a Folding board with just 2 PCI-Ex16 slots, but I don't need that.