Weird OC reboot problem. Please help.

Dear Experts,

I experienced a very weird thing yesterday and am not sure if it's CPU OC,
Ram Timing, or Ram Vcore, or all of the above related.

I am running a P4-2.8C on a ASUS P4P800SE mobo with 2x 512MB Corsair VS
sticks in Dual Channel mode. Been running smoothly at 3.07GHz for 2 weeks
without a problem. Yesterday I added 2 fans to the mobo and the problem
came up. 1 fan's for the 865PE, a 40mm cheapo, and another duallies for
under the 40gigs HDD. Both 12V drawing from my 370W (rated 440W) PSU.

The PSU is 2themax HE-370 Pro III.

When I went on to boot it up, it goes all the way to the windows welcome
logon screen. When I clicked my account, it reboots. After the reboot, it
scanned the disks and arrived at the same screen again, when i clicked my
account again, it goes in a bit and the windows logon sound got choppy and
rebooted.

This loops goes on for 2 hours.

Naturally I'd think it's the fans that I just put in, so I unplugged them
and tried again. The thing reboots just the same.

So then I went into SAFE MODE and disable autorun of the services, proxy
softwares, rivatuner and such and it still wont' boot.

So then I tried to do SAFE MODE with network support and this time it got
even weird-er, it ended in a stop error just after welcome screen [unknown
hard error], and the 80Gig Hitachi spins down and turned off. Uh oh I
thought, there goes my TNG episodes.

Hmm.. So then I went into the bios and disable aggressive setting one by
one until I arrived at the defaults. The thing fails to boot into windows
until everything was at default and now it's running solid again.

There're 6 aggressive things I can think of that might cause that, but
remember this worked perfectly for 2 weeks:

1. 2.8 OC'ed to 3.07
2. Ram Burst Length at 4 clocks instead of 8 clocks as suggested by the BOG
and Corsair Forum.
3. DDRV at 2.65V as suggested by Forum.
4. Memory Acceleration [Enabled] instead of [Auto]
5. Performance [Turbo] instead of [Auto]
6. Spread Spectrum [Disabled] instead of [Enabled] as suggested by the BOG
when OCing.

The thing I don't understand is why would it worked for 2 weeks straight
smoothly and won't boot yesterday. My computer is on 24/7. I am sure it's
not virus related, and all hardware connections are tight and clear. (I had
a case like this where the coils on the mobo touched the DVD-ROM drive and
reboots on the P2). I even re-plugged my fans back in now and it's solid.

*help a noob!*
-bron

Tru :P

"Weird" "OC" and "reboot" should never be in the same sentence together.
"OC" and "reboot" are all you need.