PC starts up... and turns off (3 times) before booting up

[billy]

I've recently upgraded my PC system which I haven't used for a month with some case fans, new 4GB DDR3 Memory and another 1TB HDD in RAID 0.

I'm using an i7-860, MSI p55-gd65, xfx 5770, two WD 1tb black, 4gb corsair and with a Seasonic m12d 850W PSU.

Everything has been working fine previously before I had to RMA the Memory due to errors.

Now, whenever I press the power button, it turns on and off twice and the third time it finally boots up and goes into the OS.

I've never had this problem before the recent upgrade and reinstalling everything with RAID 0. The mobo has been flashed before to the latest BIOS and I think I have the drivers. I'm not too sure about the drivers on the MSI site for my mobo. There are a few drivers without installers that I've downloaded so I don't know what to do with them.

Please help, I would appreciate any input on my situation. It's just wearing out my system three times as fast with every start-up

[sswilson]

Is this OC'd at all? Sounds like whatever bios settings you have aren't stable and it's rebooting to find a memory config that will work.

[billy]

I just remembered that my friend messed around with the BIOS settings on my computer and tried to overclock it until we couldn't get the multiplier for some reason.

I've reset the BIOS to the optimized settings and now when I turn on the system, no more restarting. BUT, now it shows "Missing operating system" and I can't get into my OS.

[JD]

Probably changed the SATA mode when you reset it. You should have 3 options: IDE, AHCI and RAID. Try each until it boots up. I'm guessing you'll want RAID though.

[billy]

Originally Posted by jdrom17

Probably changed the SATA mode when you reset it. You should have 3 options: IDE, AHCI and RAID. Try each until it boots up. I'm guessing you'll want RAID though.

Where can I find these modes? Thanks for the advice!

[billy]

Alright, everything is good and it properly shuts down and starts up now. Thank you so much for your inputs. Thanks.