CPU locked at 800MHz after Crash

Vampyreq

Prominent
Apr 10, 2017
7
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510
Mobo: Gigabyte H270n Wifi M-ITX
CPU: Intel i5-7500
RAM: 2x 8GB Corsair Vengeance 2400MHz
Graphics card: Radeon HD7850
1 Samung 850 Evo SSD
1 WD 640GB Black HDD
1 WD 6TB Blue HDD

I was using the computer and one day it crashed with catastrophic failure for my SSD.

Symptoms came up a few days before when watching YouTube videos, my computer will lock up and the audio will go into a very rapid loop (Imagine rewinding the audio to 0.2 seconds ago and played forward on a loop). After a few seconds it will recover and operations resume. Second time, which occurred days later, the lock up was longer but it still recovered. Third time, a very long lock up and my system had to restart.

There after, I'm unable to boot into Windows 10. Tried resetting PC using the fix windows function or whatever it's called. Tried restore point, tried reinstalling windows but it'll just keep showing the W10 boot error message "Sorry your PC ran into a problem blah blah".

Went into CMOS, noticed display artifacts, around the middle and right of my screen, there will be like a green vertical bar "corrupting" the display. This carries into OS level, which I will explain again. I tried resetting BIOS to default values which nothing was changed except higher fan speeds. Also unplugged CMOS battery. No go, SSD is kaput.

I dug out my old HDD and reinstalled W10 on it, using my integrated graphics card first. All running fine. Then I noticed that my computer seems to run pretty slow. So I opened task manager and I see that my CPU is actually running at 800MHz. The img tags don't work so I'm putting the link to the pictures here.

https://www.flickr.com/gp/113815846@N06/N2sh7K

I got alarmed, and checked "My Computer" and behold, it's also showing 800MHz

https://www.flickr.com/gp/113815846@N06/9M5037

So I checked my BIOS again. It's also showing 800MHz. I thought I'll pop my graphics card back to see what it'll do. I loaded into windows with the green artifacts, and severe slow downs. It took like double the time to boot and load windows. So now I'm using integrated graphics.

I have also checked voltages via BIOS. My mobo is detecting no problems from the PSU. 3.3V, 5V, and 12V rails are supplying the correct voltages. CPU VCORE is like 0.695V. DRAM 1.2V. Numbers are looking fine. I also passed my SSD to my brother who could access my SSD as an external disk. Not sure on booting from it yet, still waiting on that.

Also my case fans seem to be running a much less strong...no longer creating a hurricane that I remember from before...

I've also tried another known working PSU, no fix.

I'll summarise my issue here for convenience.

Catastrophic SSD failure all of a sudden.
Graphics card causes display artifacts at BIOS level, and booting into OS adds slow down issue.
CPU is maxed out at 800MHz, power supply numbers and voltages look good.
Case fans seems to be weaker now.

What's my issue here? CPU? Mobo? Everything in this computer is new, 4 months old. Except the 2 HDDs.
 
Solution
I would guess you have the GPU in the x16 slot on the motherboard.
Try putting the GPU into the x8 or x4 slot and see what happens.

Vampyreq

Prominent
Apr 10, 2017
7
0
510


Well the thing is it was running for 4 months fine. So I don't think it's about the BIOS....should I still try though?
 

Vampyreq

Prominent
Apr 10, 2017
7
0
510


Something really strange. I just tried loading default values on my BIOS, and the problem is now solved. My CPU is back to 3.4GHz...like I tried it before and it didn't work...and now it does...

But my graphics card is still semi-unusable. Using it causes display artifacts at BIOS level. And it's the lowest resolution when booted into windows with major slow downs...would this still be mobo problem, specifically with the PCI-E lane, or would this be gfx problem now?