Quote Originally Posted by Natima View Post
Hi guys, first post. YAY! I need some help getting my c0 to 4Ghz on my UD5... Many failed attempts. I'm currently at 3.8. I am no expert, this is my first build and overclock. I'm using the F7 BIOS.
Current settings are as follows:
BLCK: 200

QPI: 7.2
Uncore: 2.6
RAM: 1200
Vcore: 1.35
QPI VTT: 1.335
CPU PLL: 1.88
QPI PLL: 1.34
DRAM: 1.66
LL Calibration: Enabled.

What shall I do with the IOH Core, ICH I/O, and ICH Core?
Hi, and welcome to the boards mate..


With IOH core voltage I just set that up a few increments from stock, as for ICH i/o and core, I just leave those on Auto, as I don't think they have any effect on overclocking, as this is just the southbridge voltages.. though I could be completely wrong here, maybe someone else can chime in here and explain this in more detail?

Don't some C0 stepping i920's require the QPI/Vtt to be up to like 1.45v, and around 1.400v for Vcore to get 4GHz?

Have a look at the Gigabyte guide if you haven't done so already...

http://lakesidepc.com/Core.i7.920.oc....12.12_ENG.pdf