CPU heat issue

Anyone have any idea with the following.

Friend of mine dropped his PC with me last night to look at as the CPU all of a sudden is going from idel @ 36C - 42C to 65C in 5 minutes while playing a game and then the PC shutting down due to overheating.
Idle temperatures use to be 28C - 32C. Ram is also running 8C - 10C hotter than usual as is VCores 1 & 2.

The board is a Rev.1 Sabertooth 990FX and the CPU a FX-8120 AM3+ 3.1GHz.

I've already changed the thermal compound, have tried a new heatsink and the stock one and no change what so ever. Could it be that maybe the compound is gone on the CPU die

ED E

tJ max shouldnt be at 65*C(more like 90-100).

Is the CPU fan itself actually spinning at full speed? If the bushings were worn it could spin too slowly.

Check the case as a whole for airflow too, get the air can out and dust everything.

truedoom

does it have a dedicated graphics card that might be overheating?

ED E

ED E wrote: »

tJ max shouldnt be at 65*C(more like 90-100).

Is the CPU fan itself actually spinning at full speed? If the bushings were worn it could spin too slowly.

Check the case as a whole for airflow too, get the air can out and dust everything.

All fans and airflow are fine, PC was blown out too so no dust at all.

truedoom wrote: »

does it have a dedicated graphics card that might be overheating?

It has a dedicated card.

Was doing a bit of googling and these FX chips seem to give overheating issues.

game4it70

If the heastsink and fans are ok is it being over-volted?
Check the vcore with hw-moniter or cpuz.

game4it70

game4it70 wrote: »

If the heastsink and fans are ok is it being over-volted?
Check the vcore with hw-moniter of cpuz.

1.260 - 1.356V, not that then.

On boot straight into the BIOS the CPU temperature shot up from 30C - 67C in under a minute. This morning it stayed round 34C - 36C in the BIOS. It has me completely baffled, only thing I can think of is a fault with the FX processor.

It has been running fine for over two years up until last week.

game4it70

I'm not familiar with AMD's but i know they run higher vcore but is 1.35v not a little high?
Either way reset/clear the bios anyway.

It does sound like the cpu is faulty if the volts are normal for AMD.

game4it70

game4it70 wrote: »

I'm not familiar with AMD's but i know they run higher vcore but is 1.35v not a little high?
Either way reset/clear the bios anyway.

It does sound like the cpu is faulty if the volts are normal for AMD.

Stock voltage for it is around 1.22 - 1.35V so the voltage is fine. I've reset/cleared the BIOS twice now too. Has to be a faulty CPU.

Gumbi

I bet the heatsink isn't seated properly. Make sure it's seated properly and that there is thermal paste properly applied.

Gumbi

Gumbi wrote: »

I bet the heatsink isn't seated properly. Make sure it's seated properly and that there is thermal paste properly applied.

Seated correctly and compound is fine too. Three different heatsink coolers used so far and all three are giving similar readings and all going over 65C.

ED E

Youve done all the right things Hellboy. Failing CPU really is the only option.That or the temp sensor has failed.

Serephucus

Regardless of what the issue is, the system shouldn't shut down when the CPU hits 65°. This should happen north of 100°. This is making me think either it's something else (motherboard overheating, PSU, RAM, etc.) or you're the first case I've heard of, ever, of someone needing to RMA a CPU. :P

Gumbi

Serephucus wrote: »

Regardless of what the issue is, the system shouldn't shut down when the CPU hits 65°. This should happen north of 100°. This is making me think either it's something else (motherboard overheating, PSU, RAM, etc.) or you're the first case I've heard of, ever, of someone needing to RMA a CPU. :P

I could be wrong, but doesn't the TjMax represent an offset (specifically for AMD chips)?

Serephucus

Serephucus wrote: »

This is making me think either it's something else (motherboard overheating, PSU, RAM, etc.) or you're the first case I've heard of, ever, of someone needing to RMA a CPU. :P

Wouldn't be the first from what I read today, seems to be quite a few people having issues with them and then RMA.

Gumbi

Gumbi wrote: »

I could be wrong, but doesn't the TjMax represent an offset (specifically for AMD chips)?

According to AMD the max temp for FX8120/FX8150 (BULLDOZERS) -> 61C

deceit

Its not safe to run amd cpu's above the 60 degree mark when going by their own sensors as that realistically is 100 degree's.