My PC is freezing and plays a loud screaching noise through my headphones.

[kyle_126]

I custom built my PC about 2 or 3 years ago and have been upgrading it since. Lately, while gaming for the most part, my game will just freeze and my headphones play a very loud buzzing noise that gets louder and louder and doesn't stop. I have to manually turn off my PC and when i reboot my mobo gives post code 55. I have to clear my CMOS every time and originally i thought it was my overclock but even when my I5-6600K is at all stock settings this happens. Heat isn't the problem because i have a Dark Rock Pro 3 and my GPU has a custom water cooling loop so it doesn't dissipate heat into the case. When i looked up the post code it says it has to do with my RAM but i haven't had any problems with my RAM in the past and it it running on all default settings.
PC Parts List
.CPU: I5-6600k
.GPU: AMD R9 Fury Nitro w/ custom water loop
.RAM: Corsair Vengeance LPX DDR4 2666
.PSU: be quiet! STRAIGHT POWER 10 600W ATX 12V 80 Plus Gold
.MOBO: ASRock Z170 Extreme6 LGA 1151 Intel Z170
.Storage: Seagate Barracuda 1TB SSHD
.Case: be quiet! Silent Base 800

 

[the nerd 389]

Run memtest.

Also, where does the water loop vent if there's too much pressure? If there's an open top, the heated water can evaporate out and condense on cooler components (such as RAM).

 

[Faike]

You have to hard power down the PC?
I've seen this issue with ASROCK series a LOTTTT.
The problem was the realtek audio driver (surprisingly!). Windows kept installing it's own Realtek version and it caused this issue.
Fix:
Really remove all realtek drivers that exist using Advanced Removal on RevoUninstaller, disable "Install automatic drivers" as well.
Install the Microsoft generic sound driver.
This is usually the issue with an AMD card with an ASRock system. I've seen it several times. It was the realtek audio driver causing the problem. Complete removal of it and sticking to the generic microsoft sound driver fixed the issue for me multiple times.

If you are experiencing the following: A loud loud buzz noise while gaming where you can't do anything on your PC but do a hard boot down (powering it of by turning it off manually) then this is most likely your issue and the first thing I would do.