Older computer power cycled and also turned off when bumped.

[Moon_Frost]

I have a p67a-gd65 with a 2600k @4400kGhz
Msi 970 gtx at 1500Mhz
8gb x 2 Ddr3 gskill memory @1333mhz
Corsair psu RM750i

I've read the stickied post, but I don't know what to do at this point and I'm concerned.

I've used this every day for the last few years with no issues, and haven't downloaded anything in a while or changed any settings.

I went to turn my computer on yesterday and it wouldn't post. Just kept power cycling every 10 seconds or so. Wouldn't even turn my screen off standby.

Turned the psu off, reseated and propped up my gtx 970 that was sagging, turned computer on, still power cycled.

Took a stick of ram out, computer turned on no problem. Took that working stick out and swapped it with the other, computer turned on no problem.

At this point I assumed the ram slot was faulty, but to be sure I stuck both sticks in, (basically I ended up just swapping them around) and computer turned on. So I'm confused.

Then as I'm turning my computer up right, I barely lifted it an inch, the computer flicks off, and I believe it started cycling but I can't remember if it just shut off or cycled.

I flip it up right, turn it on and it boots successfully, all my case fans are turning, however I notice the rpm goes to max for a few seconds, then drops for a few seconds over and over. I rebooted and everything was normal.

I should mention during all this I did look at my cpu fan and cpu Temps and they were normal.

Any help appreciated. Im assuming there's either a short somewhere, a faulty psu, or motherboard is dying. I just don't know what to check now.

I was playing overwatch on it after that all night with no issues trying to stress the system.

 

[gdmaclew]

Check all of the motherboard connectors (remove and re-seat them).

 

[Moon_Frost]

I can't find a quote button.. But thanks for the reply. I'll do that when I get home. I hate issues that are inconsistent ._.

 

[Moon_Frost]

OK, haven't had boot issues since this day, but noticed something about the fans again.

I have 3 fans plugged into a nzxt sentry 2 fan controller because they were extremely loud running at 100% when plugged into motherboard.

So I turned computer on, and once again the fans would spin high for a few seconds, then slow down over and over with the controller display seemingly flashing an error.

Now I'm curious if all these issues point to a failing power supply, or could a failing fan controller cause a boot loop?

I believe the fan controller is hooked up via a molex.