[SOLVED] Reseating CPU did a really weird thing

[anonymous890]

Motherboard: MSI z97
CPU: i7-4790

I accidentally dropped the processor before on the motherboard socket, it had bent pins but I was able to fix it
Had it running for a year without problems.

Now I had to re-apply thermal paste. I took off the cpu from the socket and then cleaned it, put it back and re-applied thermal.
PC won't turn on, it turns on for a second then turns off then turns on and off, repeatedly. Putting RAM in dual channel didn't work, it seemed like it was the culprit. So I thought of reseating my CPU.
Everything all worked well. The PC run in dual channel for atleast 3 whole hours then I turned it off. The next day, it run for atleast 5 whole hours and I was downloading something that time then I got BSOD!
Stop code: KMODE_EXCEPTION_NOT_HANDLED
What failed: FLTMGR.SYS

I then restarted my PC and viola, it didn't work again. PC turning on and off for a second repeatedly happened again. Dual channel won't work, not just that, this time I thought of testing every slot.
Slots 1 and 2 didn't work at all, so ofcourse, setting it on dual channel wouldn't work right.

I took off the CPU again and put it back. And viola! everything works again in dual channel, all slots working. This has been running for atleast 5 hours now without any problems.
IDK if I'll get BSOD again. But one thing that's making me curious is that, why does reseating the CPU solved my problem?
I mean, I get it that I had bent pins, but why did it work for like hours and then I get the problem again. If it worked the first time, why won't it work always?

 

[drea.drechsler]

The contact area is very tiny on any one pin and things change dimensionaly as they heat up and cool down. If the repaired pins don't have full range of movement across the full thermal excursions of the processor, as originally designed, it will have intermittent contact at some point and...BSOD.

Removing the processor and re-seating it left it in an ever so slightly different position, just slightly enough for the tiny contact area of the misaligned pin to still make contact even as the processor heats up and cools back down.

Your system is fragile. Moving the CPU heat sink, jarring the case or just moving the system could cause the processor to move ever so slightly and make that misaligned pin be unable to make reliable contact again.

 

[anonymous890]

The contact area is very tiny on any one pin and things change dimensionaly as they heat up and cool down. If the repaired pins don't have full range of movement across the full thermal excursions of the processor, as originally designed, it will have intermittent contact at some point and...BSOD.

Removing the processor and re-seating it left it in an ever so slightly different position, just slightly enough for the tiny contact area of the misaligned pin to still make contact even as the processor heats up and cools back down.

Your system is fragile. Moving the CPU heat sink, jarring the case or just moving the system could cause the processor to move ever so slightly and make that misaligned pin be unable to make reliable contact again.

Even if the processor is properly locked, the processor could still be moved?

 

[drea.drechsler]

Even if the processor is properly locked, the processor could still be moved?

The socket has to allow for thermal expansion of the CPU package as it heats up and cools down. It may be very tiny amounts but that's all thats needed when one of those super tiny little pins is barely making contact.

EDIT ADD: Those socket types are rarely successfully repaired when the pins are touched. I'd have to say you are extremely lucky to even get this level of operation out of that board.

 

[ElectrO_90]

So how come you had to re-apply paste and if you did, why did you remove it?

Anyway, I'd go over the pins again with a decent magnifying glass and check for bent ones.

 

[anonymous890]

The socket has to allow for thermal expansion of the CPU package as it heats up and cools down. It may be very tiny amounts but that's all thats needed when one of those super tiny little pins is barely making contact.

EDIT ADD: Those socket types are rarely successfully repaired when the pins are touched. I'd have to say you are extremely lucky to even get this level of operation out of that board.

If I continue using this motherboard, will I damage my other components? like gpu, ram, psu and especially cpu. I also have a brandnew cryorig h7 quad lumi installed.

 

[drea.drechsler]

If I continue using this motherboard, will I damage my other components? like gpu, ram, psu and especially cpu. I also have a brandnew cryorig h7 quad lumi installed.

Data damage is way more likely than any other hardware damage. So just keep good backups as it might decide to crash anytime and you never know if that might corrupt a hard drive, at worst, or just pending writes of unsaved recent work, at best.

Also avoid moving or jarring the system when operating.