Shut down after overclock, now it wont POST

Gurupitka33

Commendable
Aug 11, 2016
1
0
1,510
Hello there, I usually dont post on these forums and try my best to find an answer from an existing thread. However, my situation is very unique and I could definitely use some help! First off, I work in the IT field and have built countless systems, I know my way around a computer very well, which is why this is so infuriating.
Specs:
MOBO: Asus m5a99fx pro 2.0
CPU: AMD FX 8350
RAM: 16gb Corsair Vengeance 1866
GPU: Gigabyte windforce 780 ti 3gb
PSU: 750w EVGA 80+ Gold
CPU Cooler: Deepcool Captain 240mm Liquid Cooler

Ill start from the top, I attempted to overclock my AMD FX 8350 to 4.5 Ghz with 1.42v( I have overclocked this processor before and have been running at 4.3Ghz and 1.35v for awhile now with no issues). Now, I ran a stability test for three hours and everything was looking fine, temps were around 50 degrees Celsius throughout. However, while I was monitoring the stability test, my computer shut down, no blue screen no error, nothing. So naturally I try to boot it back up. It turned on and began to POST but was cut short and shut down again, this will happen over and over again. First thing I tried to do (given that I thought I fried my cpu): took the RAM out and attempted to boot, I get beeps indicating there is RAM missing, however when I reinsert the RAM it goes back to attempting to POST then failing. To my understanding, if the CPU, PSU, or Mobo were bad, wouldnt there be no beeps? Next I tried to clear the cmos battery and left unplugged overnight. Didnt help. Tried resetting CMOS via the jumper, no go. I have an asus mobo with bios flashback utility. So I tried to reflash the bios assuming the overclock was actually unstable and thought that setting clock settings to default would fix it, still does the same thing. I tried pressing MEMok on my mobo to fix potential RAM issues, that didnt help either.
At this point I have no idea what to do and could use some help from someone more advanced and experienced than me.
 
Solution
1. take the battery out and unplug from the wall and power on. it should power on for like a second. plug it back in after and turn it on. it should try to recover the bios and give you an option to go into the bios. reset it, you might have to do this manually.

2. Spam the reset/restart button. After 4-5 restarts you should hear a click that indicates the bios resetting to its default values.

3. Reset the CMOS - after that re-seat 1 ram in different slots. Unplug the main power connector to your mobo,then reconnect it. If this doesn't work then re-seat your processor

Note: Make sure if you clear CMOs that your computer is NOT plugged in. It can potentially damage things. Pulling out the bios battery or pressing a small Clear CMOS...

bboiprfsr

Honorable
Dec 23, 2013
394
0
11,160
1. take the battery out and unplug from the wall and power on. it should power on for like a second. plug it back in after and turn it on. it should try to recover the bios and give you an option to go into the bios. reset it, you might have to do this manually.

2. Spam the reset/restart button. After 4-5 restarts you should hear a click that indicates the bios resetting to its default values.

3. Reset the CMOS - after that re-seat 1 ram in different slots. Unplug the main power connector to your mobo,then reconnect it. If this doesn't work then re-seat your processor

Note: Make sure if you clear CMOs that your computer is NOT plugged in. It can potentially damage things. Pulling out the bios battery or pressing a small Clear CMOS button at the back of the motherboard if you have one should fix things up.
 
Solution

pepslight

Reputable
Sep 20, 2014
438
0
4,960
Or could really be that you killed part of the CPU. Another possibility whould be that you corrupted your system (probably not) but still worth to check by booting im safe mode

Edit: could assell be the Motherboard that toasted.

How many volts is the processor getting ? Sounds dumb but, i know on some intel processors there are some resistors soldered in the midle of the chip, if there is some resistors aswell with the fx processors and they fried, could be you getting to much or even not enough juice. Worth to check it
 

Stysner

Reputable
Apr 9, 2015
317
0
4,960
I think it's the motherboard or the PSU. RAM wouldn't fail out of the blue when you didn't change the clockspeed, the CPU wouldn't suddenly die when it's not even getting that hot.

So either another part of the motherboard got too hot (VRMs maybe?) or the PSU was pushed to it's limits and died. It could still give decent voltage on one rail and completely fail on another, giving you this weird issue.

It's a VERY decent PSU though, more than enough wattage to provide for that system and a whopping overclock on everything.

So my bet is on the motherboard, and particularly the VRMs. Have you inspected it for leaking caps?