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CPU Vcore huge jump, then PC crashes

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October 12, 2013 4:48:51 PM

Recently my PC started to crash. There was no rule, nor for how long it worked or under what load it was. Screen goes blank, as if it loses the signal from the PC, meaning that the monitor was on and that's it. At first I thought it was the graphics card, and the RAM, but I tried the graphics card in another PC, it worked normally, and I tried another RAM, but it crashed again. I opened the AI Suite and monitored the voltages in the Thermal Radar. +3.3 V is always red, as a warning, but nothing happens because of it, what I figured out is that Vcore voltage varies greatly, from 1.338V to 1.464V, then al of a sudden it jumps up and the PC crashes. 3 times I recorded voltages with a phone and one time it jumped up to 1.512V, the other two times 1.476V and 1.488V. Also I saw it go as high as 1.564V in the BIOS monitor before it crashed.

The BIOS is default settings, all components at stock, no OC.

Is this a software issue, solvable in the BIOS or a hardware issue?

PC components:
CPU:
AMD Phenom II x6 1090T Black Edition @ 4.0 GHz
MBO:
ASUS Sabertooth 990FX R2.0
RAM:
Kingston HyperX Blu DDR3 1600MHz 1x4GB
GPU:
MSI R7950 TwinFrozr III OC/BE
PSU:
Corsair TX650 V2
HDD:
Seagate Barracuda 500GB 7200 RPM


Thank you.
October 12, 2013 5:01:18 PM

rapture868 said:
Recently my PC started to crash. There was no rule, nor for how long it worked or under what load it was. Screen goes blank, as if it loses the signal from the PC, meaning that the monitor was on and that's it. At first I thought it was the graphics card, and the RAM, but I tried the graphics card in another PC, it worked normally, and I tried another RAM, but it crashed again. I opened the AI Suite and monitored the voltages in the Thermal Radar. +3.3 V is always red, as a warning, but nothing happens because of it, what I figured out is that Vcore voltage varies greatly, from 1.338V to 1.464V, then al of a sudden it jumps up and the PC crashes. 3 times I recorded voltages with a phone and one time it jumped up to 1.512V, the other two times 1.476V and 1.488V. Also I saw it go as high as 1.564V in the BIOS monitor before it crashed.

The BIOS is default settings, all components at stock, no OC.

Is this a software issue, solvable in the BIOS or a hardware issue?

PC components:
CPU:
AMD Phenom II x6 1090T Black Edition @ 4.0 GHz
MBO:
ASUS Sabertooth 990FX R2.0
RAM:
Kingston HyperX Blu DDR3 1600MHz 1x4GB
GPU:
MSI R7950 TwinFrozr III OC/BE
PSU:
Corsair TX650 V2
HDD:
Seagate Barracuda 500GB 7200 RPM


Thank you.


there's a way to control the v core-what kind of motherboard you have- you will need to stress test it
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October 12, 2013 5:07:27 PM

It say right there, ASUS Sabertooth 990FX R2.0.
I know I can change Vcore manually, I have some experience with overclocking etc, but I never encountered this problem. I stress tested it and it didn't crash, but then crashes while I'm in BIOS or browsing internet. There's no specific action that causes it to crash. It's random.
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October 12, 2013 5:12:58 PM

AMD Phenom II x6 1090T Black Edition @ 4.0 GHz

I'm pretty sure the 1090T does not operate at that speed default clock rate, bad vdroop may be the cause of your crashing also. I would look into why your 1090T is 4.0ghz instead of 3.2ghz at default clock rates. 200 base clock with a multiplier of 16x = 3200 (mhz).

EDIT: This link describes all the specs you need to know for that cpu to correctly configure it again in your motherboards BIOS.
http://www.cpu-world.com/CPUs/K10/AMD-Phenom%20II%20X6%...(HDT90ZFBGRBOX).html
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October 12, 2013 6:07:55 PM

Sorry, I forgot... The PC configuration is a copy/paste, my CPU is currently @ stock.
I reseated it about 20 minutes ago and it seems to be fine for now; stupid me, should've done that first.
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a b U Graphics card
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October 12, 2013 6:21:57 PM

So clock rates, multiplier, voltages etc etc are all stock now? Everything seems to be in working order and holding stable?
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October 13, 2013 3:49:34 AM

Nope, it still crashed, but this morning I reseated everything, components and cables, and now it's all fine. In the Thermal Radar, I noticed that the +3.3V voltage is no longer around 2.8V-2.9V range, now it's 3.312V and does not change at all.
Vcore still changes a bit, but not dramatically. I ran OCCT and it was stable.
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