Question CPU Fan goes full blast - then pc freezes and restarts

surendervi12

Prominent
Sep 21, 2018
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HI there

I'm currently in the process of troubleshooting a computer. When I first built it, the computer booted fine - I then decided to stress test the pc. Running Unigine Heaven the total system power consumption was at 250W. I then ran prime 95 and power consumption was around 170 W IIRC. I ran the test for 5 minutes before the computer suddenly froze and shutdown. I rebooted the pc and tried to run prime95 again looking at hwmonitor to see if anything was out of the ordinary. After another 5 minutes I saw smoke coming from either the center of the motherboard or the cpu so I shut the system off.

Now when I boot my pc, the fans suddenly go full blast after around 1 minute - I cannot boot into windows. I think that the cpu may be overheating or dying. I've reapplied some thermal paste to see if it helps but there has been no change.

I would appreciate any thoughts.

Specs:

Motherboard: HP Z200 Workstation
CPU: Xeon x3450
Storage: 1 TB Hard Drive
Graphics: RX 470 Sapphire Nitro
Power Supply: 350 W Stock HP Z200 Power Supply
 

poorbugger

Reputable
Nov 28, 2015
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Smoke came out? That's never a good sign. The psu or the cpu might be dead at that point. The fans continued running or it just start running off full blast for a moment and the pc goes dead?
 

surendervi12

Prominent
Sep 21, 2018
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510
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Pretty sure the PSU is fine - it ran the GPU fine at higher wattage - only ran into issues with prime95. Thanks for the responses poorbugger and InvalidError. I will probably look into getting another x3450 chip to see whether the motherboard is fried or the cpu then.

In the worst case scenario I can always get a Magic Smoke Refill.
 

surendervi12

Prominent
Sep 21, 2018
16
0
510
0
Smoke came out? That's never a good sign. The psu or the cpu might be dead at that point. The fans continued running or it just start running off full blast for a moment and the pc goes dead?
Yes, the fan went full blast for like 5 seconds and then the pc goes dead and tries to reboot. The load on the meter also increases by around 40 W once then fans start up - not sure if that helps.
 

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