E6420 Overclocking Woes

[Linux23]

Got a E6420 a few weeks back, and a DS3 Rev3.3 G.Skill 4-4-4-12 PC800 RAM, and the build went really well. I let the components break in for 48hrs. Then I upped the FSB a little (300MHz), and the system continually kept rebooting itself over and over until I cleared the CMOS. Found out there is a F11b beta BIOS for 6420 support.

Installed the BIOS fine. OC'd moderately to 333MHz FSB, everything is stable and runs fine. Now I bump it to 350 and it finally boots past BIOS, but as soon as Windows loads, it instantly reboot.

This is just meager 2.66GHz. What in gods name could be holding me back. I should at least be able to get a respectable 3Ghz. Any ideas, advice on how I can get a higher OC. My CPU temps under 333MHz was just under 35c. I know I should be able to push this CPU to at most 400x8. It works just fine a 400x7.

Here are some specs:

Here are my stable 365x8 settings
PCI Express Frequency (102Mhz)
CIA 2 Disabled
System Memory Multiplier 2.00

System Voltage Control
DDR2 Overvoltage Control +0.3V
PCI-E OverVoltage Control+0.1V
FSB Overvoltage Control +0.1V
CPU Voltage Control 1.37500V
Memory manually set to 4-4-4-12 (specs on the box)
Refresh to ACT Delay is at 0 (Not sure if this matters)

As soon as I bump it to 270, it reboot 3 times and sets everything to stock.

I am at a loss here guys. Any help welcome.

Whoops. Noobie mistake. Wrong forums.

 

[ziddey]

how bad is vcore drooping under load? what are you setting vmch? what week e6420 do you have?

try these cookie cutter settings:

401fsb
7x multi
1.5vcore (for testing of course)
+0.3vmch
+0.1vfsb
+0.1vpcie
+0.3vdimm

ram 2.00x

set timings to 5-5-5-15. the subtimings i think should be alright at whatever ds3 sets them stock (I recall them being ridiculously loose)

see if it'll boot and be stable at these settings before we proceed.

if it is stable, try increasing multiplier to 8x and see what happens.
then, try dropping fsb to 400. then try dropping vcore.