New Computer Turning Off Under Load

[Jared_1]

Hello, I just put my new desktop together yesterday and I'm running into an odd issue where the computer keeps shutting off. When it shuts off, pressing the power button does nothing. I have to remove the power going to the power supply and wait for the capacitors to drain before I can turn it back on. I've even had it shutoff during POST right after it shutdown the first time. The parts are as follows: Ryzen 5 3600, G.Skill Ripjaws V 16GB, Asrock B450M Pro 4, Antec EA-500 PSU and an MSI 5600 XT Mech OC.

 

At first I thought it because I had XMP turned up to 3200 MHz but it crashed even when I turned XMP off. I also ran Memtest and there were no errors found. I had it crash twice today while waiting GTA Online to load after playing some story mode and then I had it crash when I was actually playing in GTA Online. It also crashed during Resident Evil 3. I ended up downloading FurMark and left it running. I walked away from the computer at about the 7 minute mark and when I came back about 5 minutes later, the computer was off. At this point, I'm thinking it's the power supply. I'm thinking if it was the GPU, I would be able to turn the computer back on immediately. Unfortunately, the only other PSU I have only as a 6 pin PCIe power and the GPU requires an 8 pin.

 

I've used this PSU in my old system with no problems but I was only running an AMD x4 845 and a GTX 750 Ti. I got the PSU off Ebay last year for another computer but I swapped it into my main PC since it had two 8 pin PCIe plugs. Am I correct in my assumption that the PSU is at fault here?

[Night Wolf]

Have you installed msi afterburner for the control of the gpu fan speed ?

[Jared_1]

No

[Night Wolf]

Install it and set the fan speed graph for a maximum temperature of 80-85°C otherwise the fan will stay at idle and wil create a overheating of the graphic card.

[Jared_1]

The GPU was at 66°C while under load so I don't know why or how it would be overheating. Both fans are running all the time and ramped up during load.

[Night Wolf]

Did it shut down brutaly ?

[Jared_1]

Yeap. I'm sitting mid game and it just shuts off as if someone turned off the power to the outlet. I can't turn it back on unless I remove the power from the power supply and push the power button to drain all the residual charge in the power supply. Only then will it turn back on.

[Night Wolf]

Yes it seems to be an overcharge security of the power supply but i'll double check...

[Night Wolf]

After an aproximative calculation 500W is a bit weak for the whole system. Do you have another atx power supply with at least 350 watts capacity ? and support pci express auxiliary power ?

[Jared_1]

I have a 450 watt power supply but it only has a 6 pin PCIe plug and the GPU needs an 8 pin.

[Night Wolf]

Use the second power supply for powering motherboard and drives and the second one for the graphic card only. If it work that way. The power supply is to weak.

[Jared_1]

I will give that a try.

[Night Wolf]

Do you know how to turn on the second power supply ?

[Jared_1]

Yes. I have Furmark running now, we'll see what happens.

[Jared_1]

Alright. I ran Furmark for 15 minutes and didn't have a problem. I also played some GTA and no problem either. Looks like I need a new PSU.

[Night Wolf]

Yep