unstable overclock

[adelburn]

need advice on whatis wrong.

got a E2140 @ 333x8 = 2.666mhz
Ballistix 5300 RAM divider set to 1:1
This is on a GA-P35C-DS3R

I have run Orthos for 12hours and memtest and both are fine, temps are fine no crashing, freezing so all ok.

However when I boot up the pc boots for a second and then powers down, then boots up again fine, but disables all the OC settings.

I know this is a feature of the board as it will do this for unstable OC's but why when Orthos etc is fine?

 

[adelburn]

The CPU runs stable @ stock volts 1.325 iirc, I've gradually pushed this upto 1.5v just to make sure it's ok but still happens.

pci-e frequency has been locked to 100

Tried alsorts of mem dividers, even had it so mem was 1066mhz 5-5-5-15 even that was stable, jst cant figure out why it keeps rebooting when I trun it on?

Crucila website says ram should be set @ 2.2v, but I've now changed that to stock 1.8v and that seems to be doing the trick for now?

Maybe I have a duff stick?

Any think else you reccomend trying