Question PC shuts down when stressed ?

[FeverDev]

So, recently I got a cheap i7 for my pc to remove as much bottleneck as possible. My pc was shutting down because CPU was reaching 95+ on stress test so i went and bought a cheap cooler and now it maintains < 70C.

If I turn off turbo boost ( @ 3.4ghz) and run PRIME95, the cpu draws 52-53watts, running at 3.4ghz and is very stable. I can also do normal gaming and normal work with turbo boost on. Temps are very cool , < 70C.

However when I turn on turbo boost, the cpu runs at all core turbo (@3.67ghz) and draws as high as 66W on PRIME95 torture test. This causes the pc to shutdown within 30seconds of starting the test. Video rendering (4k videos) also shuts off my pc after 5minutes drawing a peak of 57W.

Any normal stress test drawing <55W with the GPU also maxed out drawing 110W does not seem to cause any problems so i think the PSU is fine. CPU and GPU cooling is also adequete. Case airflow is acceptable, GPU only peaks 65C with my custom fan curve.

I suspect it could be the motherboard, especially the VRMs. 4PIN only for the CPU power and I can only see 2 chokes with 4 mosfets on the left side with a single choke on top ( is it worse than a 3phase VRM motherboard?) My old i5 had no issues with turbo boost but it also only pulled 33W at most. There are no motherboard sensors and HWINFO doesn't show VRM temps. 🙁

Specs:
MOBO:- Esonic H61 FEL-U
CPU:- i7 3770
COOLER:- Coolermaster Hyper T20
RAM:- 16GB DDR3 1600mhz
GPU:- Zotac Gaming X GTX 1660S
PSU:- Corsair VS650 650W 80+ Bronze
HDD:- WD BLUE 7200RPM 500GB 16M
SSD:- 2 Generic SATA SSDs 256gb (dram-less)

 

[Lutfij]

What i5 were you on prior to the i7-3770? Did you need to perform a BIOS update prior to dropping in an i7-3770 in there? How old is your PSU? You forgot to mention the make and model of your case.

There are no motherboard sensors and HWINFO doesn't show VRM temps. 🙁
The board you have is meant for no -frills office systems, not meant to handle a high end processor, IMHO. If your BIOS is pending an update, might as well go ahead with it. Clear the CMOS and then retry with your system and a stress test.

 

[ohio_buckeye]

Also you may need a different cooler. The T-20 if I remember properly is a small tower cooler. You might want to look at a decent down firing air cooler that can cool the cpu but that also blows air onto the boards vrms.

 

[thestryker]

I would assume the VRM is the source of the problems whether insufficient or just overheating. You could try to get some inexpensive heatsinks and/or fan for airflow over them. I'm not sure this would resolve it though.

 

[FeverDev]

What i5 were you on prior to the i7-3770? Did you need to perform a BIOS update prior to dropping in an i7-3770 in there? How old is your PSU? You forgot to mention the make and model of your case.

There are no motherboard sensors and HWINFO doesn't show VRM temps. 🙁
The board you have is meant for no -frills office systems, not meant to handle a high end processor, IMHO. If your BIOS is pending an update, might as well go ahead with it. Clear the CMOS and then retry with your system and a stress test.

It was an i5-3470S (65w). No bios update, it was plug and play, bios is also very primitive with no easy flashing options, doubt this chinese generic OEM even puts out updates.

PSU is old, can't remember much but it was about 3years old? I believe the psu is fine , it can handle full load gaming with no problems.

Case is Antec NX200 with 1 120mm exhaust fan. I ziptied a stock cooler fan on top as a intake and it blows air directly onto the vrms.

 

[FeverDev]

Also you may need a different cooler. The T-20 if I remember properly is a small tower cooler. You might want to look at a decent down firing air cooler that can cool the cpu but that also blows air onto the boards vrms.

I can't get a new cooler now, this one does its job very well. I currently have a stock intel fan blowing air directly onto the vrms and also acting as a intake.

I touched the vrms with my bare finger and it almost burnt me, ouch. Must have been 50-80degrees. Don't have a heat gun to check though.

 

[FeverDev]

I would assume the VRM is the source of the problems whether insufficient or just overheating. You could try to get some inexpensive heatsinks and/or fan for airflow over them. I'm not sure this would resolve it though.

I have a stock intel fan blowing air onto them and I am sure that is not helping much.

Heatsinks sounds good but the cooler's circular mount just gets in the way.