Think I killed my CPU

[STRMfrmXMN]

I have a 4670k I had at 3.9 GHz at 1.159V in my old B85M-DS3H

 

I bought a Z87MX-D3H

 

Installed CPU and everything booted up fine and I had a perfect system.

 

Go into BIOS to set voltage to 1.16V and clock to 3.9 GHz.

 

Run Prime95 to test if clocks are for some reason not stable even though this is basically identical to how I just had the CPU set. The literally second the CPU gets to 100% load the entire system shuts off without warning.

 

I put all my hardware in both motherboards and neither will boot now. Did I just kill my CPU? How exactly? Could it have been from a short?

[Matias_Chambers]

Try a different power outlet. You could also try clearing the CMOS again. 

[Bananaman1]

It is possible as Linus himself has warned against using Prime95 as it can stress your CPU too much and damage your system.  

[Matias_Chambers]

Just now, Matias_Chambers said:

Try a different power outlet. You could also try clearing the CMOS again. 

And different powersplitter or whatever if you are using one. 

[Percenary]

4 minutes ago, STRMfrmXMN said:

I have a 4670k I had at 3.9 GHz at 1.159V in my old B85M-DS3H

 

I bought a Z87MX-D3H

 

Installed CPU and everything booted up fine and I had a perfect system.

 

Go into BIOS to set voltage to 1.16V and clock to 3.9 GHz.

 

Run Prime95 to test if clocks are for some reason not stable even though this is basically identical to how I just had the CPU set. The literally second the CPU gets to 100% load the entire system shuts off without warning.

 

I put all my hardware in both motherboards and neither will boot now. Did I just kill my CPU? How exactly? Could it have been from a short?

Are you checking the temps?

[aisle9]

I really don't want to be that guy, especially when you're involved, but are you sure your PSU didn't go bye-bye?

 

A stick of RAM that was shorted by a bad DIMM also comes to mind as a possibility.

[STRMfrmXMN]

2 minutes ago, Matias_Chambers said:

Try a different power outlet. You could also try clearing the CMOS again. 

Done the CMOS clear like 80 times. PSU self-tester works so it's not the wall socket

 

2 minutes ago, Mlupo19 said:

It is possible as Linus himself has warned against using Prime95 as it can stress your CPU too much and damage your system.  

This CPU was at 100% for less than a second though and worked just fine in my old board

 

1 minute ago, Percenary said:

Are you checking the temps?

Can't really do that but it was at like 40C before it gave up

[Matias_Chambers]

1 minute ago, Mlupo19 said:

It is possible as Linus himself has warned against using Prime95 as it can stress your CPU too much and damage your system.  

He did in his Skylake overclocking video. Haswell CPU's get rather hot in Prime. I have heard that Prime overvolts your CPU. I have run Prime multiple times even for 1-2 hours without problems on my 5820K though. Temps where ridiculously high though. 

[STRMfrmXMN]

1 minute ago, aisle9 said:

I really don't want to be that guy, especially when you're involved, but are you sure your PSU didn't go bye-bye?

 

A stick of RAM that was shorted by a bad DIMM also comes to mind as a possibility.

Tested all my RAM, PSU self-tester works fine

[Matias_Chambers]

1 minute ago, STRMfrmXMN said:

Done the CMOS clear like 80 times. PSU self-tester works so it's not the wall socket

 

This CPU was at 100% for less than a second though and worked just fine in my old board

 

Can't really do that but it was at like 40C before it gave up

Try with 1 RAM stick, try with no GPU

[Energycore]

6 minutes ago, STRMfrmXMN said:

The literally second the CPU gets to 100% load the entire system shuts off without warning.

Sounds like a protection circuit shutdown. So bad motherboard or PSU (probably not the PSU). Did you check the socket before putting the CPU in there?

A short circuit probably killed both things by shooting 12V through the socket

1 minute ago, Matias_Chambers said:

I have heard that Prime overvolts your CPU.

It doesn't

[STRMfrmXMN]

1 minute ago, Matias_Chambers said:

Try with 1 RAM stick, try with no GPU

Already done that

 

I'm like 99% certain my CPU is dead

[Jumper118]

craptastic board be craptastic  RMA cpu time? 

[Matias_Chambers]

21 minutes ago, Matias_Chambers said:

Try with 1 RAM stick, try with no GPU

And try different RAM slots. 

20 minutes ago, STRMfrmXMN said:

Already done that

 

I'm like 99% certain my CPU is dead

Yeah it sounds like it.

[STRMfrmXMN]

1 minute ago, Energycore said:

Sounds like a protection circuit shutdown. So bad motherboard or PSU (probably not the PSU). Did you check the socket before putting the CPU in there?

A short circuit probably killed both things by shooting 12V through the socket

It doesn't

socket seemed totally fine. Could the short have been from not having the screws in the motherboard standoffs correctly? I had all but one screwed in (ran out of standoffs)

[Matias_Chambers]

1 minute ago, Jumper118 said:

craptastic board be craptastic  RMA cpu time? 

He bought it used.

[STRMfrmXMN]

21 minutes ago, Matias_Chambers said:

And try different RAM slots. 

Did that too

21 minutes ago, Jumper118 said:

craptastic board be craptastic  RMA cpu time? 

The Z87MX isn't really a bad board, I dunno. Can't RMA CPU cuz it's used

[Energycore]

1 minute ago, STRMfrmXMN said:

socket seemed totally fine. Could the short have been from not having the screws in the motherboard standoffs correctly? I had all but one screwed in (ran out of standoffs)

Only if the mobo PCB touched the case otherwise I don't think so

[Matias_Chambers]

1 minute ago, STRMfrmXMN said:

Did that too

Try a new CMOS battery if you have one?

[RadiatingLight]

Prime95 doesn't work well with haswell. you killed it.

(or as linus would say, "it randomly died for no reason")

[STRMfrmXMN]

1 minute ago, Energycore said:

Only if the mobo PCB touched the case otherwise I don't think so

OK, what if it touched a standoff that wasn't supposed to be where it is? By that I mean when I was first starting off building my system a few years ago I put one in a random screw hole on in the chassis that I thought was necessary for my board but wasn't and it's completely non-removable. I think with the new board, which is much bigger, said standoff was definitely touching the board near where the bottom PCI slot is. Could that have done it?

[Matias_Chambers]

3 minutes ago, STRMfrmXMN said:

Could the short have been from not having the screws in the motherboard standoffs correctly?

Yes that's the reason standoffs screws are a thing. But like @Energycore said:

2 minutes ago, Energycore said:

Only if the mobo PCB touched the case otherwise I don't think so

 

[grimreeper132]

Do you still have your old board if so try your CPU in that to check to see if it's a dead CPU or dead motherboard.

[STRMfrmXMN]

17 minutes ago, RadiatingLight said:

Prime95 doesn't work well with haswell. you killed it.

(or as linus would say, "it randomly died for no reason")

I've run Prime95 and never had problems before. Guess I'm not doing that now...

16 minutes ago, grimreeper132 said:

Do you still have your old board if so try your CPU in that to check to see if it's a dead CPU or dead motherboard.

read OP

[Matias_Chambers]

1 minute ago, grimreeper132 said:

Do you still have your old board if so try your CPU in that to check to see if it's a dead CPU or dead motherboard.

 

14 minutes ago, STRMfrmXMN said:

I put all my hardware in both motherboards and neither will boot now.