My C0 bios settings are:

Vcore - 1.325 (can't lower anymore)
QPI/VTT - 1.24
CPU/PLL - 1.84
Dram Voltage - 1.64
Hyperthreading - On
All other volts - AUTO
All Power Saving features Off
Turbo Off

Temps: 40 idle, 74 Max Load OCCT, 76 Max Load Linx (office w/ AC).

Tested @ OCCT w/ HT on: 4 hours Small Data Set, 1 hour Large Data Set, 1 hour & 30 Medium Data Set. = All Passed
Tested @ Linx Full Memory 20/20 = Passed

It's stable yes, but i searched somewhere i need to raise my qpi/vtt? i am actually confused. Also someone said if you set your qpi/vtt to 1.35 then you can run drams up to 1.85volts right? if you run 1.24 qpi/vtt it means i can run drams up to 1.74volts? so my settings are correct?

Specs:

<table width="100%" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td valign="top" width="25%" height="26">CPU
i7 920 D0 @ 4.0ghz + HT (1.25v)/ C0 @ 3.8ghz + HT
</td> <td valign="top" width="25%">Motherboard
Gigabyte X58 Extreme
</td> <td valign="top" width="25%">Memory
6GB 3x2 OCZ DDR3 1600 Triple Channel
</td> <td valign="top" width="25%">Graphics Card
2 x MSI HD4890-OC Crossfire
</td> </tr> <tr> <td valign="top">Hard Drive
1TB WD Caviar, 300GB WD VelociRaptor
</td> <td valign="top">Sound Card
X-Fi Xtreme Fidelity SB Motherboard Built-in
</td> <td valign="top">Power Supply
Gigabyte Odin Pro 1200
</td> <td valign="top">Case
Lian Li Armorsuit P80B
</td> </tr> <tr> <td valign="top">CPU cooling
Megatron Push+Pull w/ ZM-F3 Red Led Fans
</td> <td valign="top">GPU cooling
4890 Stock Cooler
</td> <td valign="top">OS
Windows Vista 64
</td> <td valign="top">Monitor
LG 22" @ 1680x1050
</td></tr></tbody></table>