computer starts normally then shuts off

[astraeos]

I've been having a rough day... I got a new graphics card, motherboard and power supply today. I rebuilt my computer twice now.

Initially when I had the new motherboard, power supply and 2nd graphics card in the computer would start normally and then crash after a while (I had logged in and was changing my settings).

I was told that I would need to do a clean install so I rushed out to best buy and bought their only copy of windows 10 which was in Spanish (just keeps getting better).

Computer still crashed, when I tried loading up windows 10 and installing, it would crash.

After a few attempts I decided the motherboard wasn't worth the headache and id be able to return it. Put my old board in and I still had the problem that the computer would start up, give me the ok beep and do its normal load up, only to crash.

I now think its the power supply, I checked multiple times, everything was plugged in, so I took out the new one and put the old back in. Again, the computer would start up, give the ok beep and then shut off shortly after.

I have never encountered this and I have no idea how to even start fixing it. Please help

 

[astraeos]

I've also tried testing different ram slots, having on stick of ram in, and taking the battery out and putting it back in.

It loads normally but before I get to the windows screen it shuts down

 

[NEmpire95]

What are you specs? Have you reapplied thermal paste? Did it blue screen or just turn off completely?

 

[astraeos]

Currently:
Gpu: Amd radeon r9 270x (x2)
Psu: 600w (idk the brand, came with the PC I initially bought)
CPU: Amd 8350 black edition
Ram: 16gb corasir vengance

New parts I bought:
Evga supernova 850g2
Gigabyte 990fxa-ud5 r5

 

[NEmpire95]

Have you check the socket on either motherboard for bent pins? Have you reapplied thermal paste? Did it blue screen or just turn off completely?

 

[astraeos]

I've checked everything and dd the thermal paste. When I start the computer it shows the mother board then shows it starting up like normal the. It just shuts off

 

[astraeos]

I've also tries removing the new graphics card so its just my old computer, still crashes.

 

[NEmpire95]

Could be your hard drive. Try using a different one if you have one.