It all started with this dumb new Corsair power supply that I got from Best Buy.
When I went to plug in and test the new PSU, I plugged in only the 24-pin and 8-pin CPU power. All was fine. I proceed to insert the new PSU into my case and get it all cable managed. I tested it again, with only the 8-pin and 24-pin in and it worked fine as suspected. But after I plugged in my peripherals into the PSU and turn on my computer, it immediately shut off after turning on.
After that, I try and turn it on and nothing. I tried to almost everything to get it working. Another PSU, reset the CMOS, took it out just in case it wasn't shorting, re-seated all the connectors, etc. That did nothing.
Then after getting really frustrated, I tried to test the PSU on another machine to see if it was at fault. I plugged in the 8-pin CPU and 24-pin power and it turns on fine. But as soon as I plug in the peripheral connectors into the PSU, it immediately powered off when I powered it on. Now with a twist, no matter which power supply I use on that computer, it turns on and immediately turns off. I have tried all the troubleshooting with this PC as well.
A day later, I thought to myself, maybe it's the CPU? So I go to the second computer that I tested with the PSU, and I went ahead to take the CPU out, and... you guessed it, it turns on without immediately powering off.
I then go back to my computer that was originally going to have the new PSU in it, and I take the CPU out, and the motherboard turns on. Put it back in, nothing happens.
Does this mean the power supply fried both CPUs?
EDIT: System Specs
Windows 10 64-bit Build 1803
Ryzen 5 1400 @ Stock
MSI B350M Gaming Pro
XFX RX 480
2x G.Skill Ripjaws 8GB 2666Mhz
When I went to plug in and test the new PSU, I plugged in only the 24-pin and 8-pin CPU power. All was fine. I proceed to insert the new PSU into my case and get it all cable managed. I tested it again, with only the 8-pin and 24-pin in and it worked fine as suspected. But after I plugged in my peripherals into the PSU and turn on my computer, it immediately shut off after turning on.
After that, I try and turn it on and nothing. I tried to almost everything to get it working. Another PSU, reset the CMOS, took it out just in case it wasn't shorting, re-seated all the connectors, etc. That did nothing.
Then after getting really frustrated, I tried to test the PSU on another machine to see if it was at fault. I plugged in the 8-pin CPU and 24-pin power and it turns on fine. But as soon as I plug in the peripheral connectors into the PSU, it immediately powered off when I powered it on. Now with a twist, no matter which power supply I use on that computer, it turns on and immediately turns off. I have tried all the troubleshooting with this PC as well.
A day later, I thought to myself, maybe it's the CPU? So I go to the second computer that I tested with the PSU, and I went ahead to take the CPU out, and... you guessed it, it turns on without immediately powering off.
I then go back to my computer that was originally going to have the new PSU in it, and I take the CPU out, and the motherboard turns on. Put it back in, nothing happens.
Does this mean the power supply fried both CPUs?
EDIT: System Specs
Windows 10 64-bit Build 1803
Ryzen 5 1400 @ Stock
MSI B350M Gaming Pro
XFX RX 480
2x G.Skill Ripjaws 8GB 2666Mhz