Why does my motherboard keep melting?

clyde01

Prominent
Dec 1, 2017
2
0
510
Hey guys, So i built a desktop 11 months ago and it worked for about 4 months then the PCIe slot melted and took my graphics card with. ASRock replaced the motherboard for me and i got a different graphics card. That worked for about 2 months, then the same thing happened. Again ASRock replaced the motherboard and i got another GPU. So now, since this is my 3rd time, I don't want to fry it again. So i guess my question is what is the problem? Is it too much power from my power supply? Is it a bad motherboard?
Specs

CPU: i7 /w Silverstone TD02-LITE Durable High- Performance Liquid cooling

Motherboard: ASRock Z270 KILLER SLI /AC

1st graphics card: PNY GeForce GTX 1060
2nd: MSI GeForce GTX 950
Current: MSI GeForce GTX 1050Ti

PSU: RAIDMAX 700W

8GB RAM

I ordered a smaller PSU and thats coming in the mail. I don't want to risk it again if it is my power supply so my PC is just sitting here waiting.

New PSU: CORSAIR 550W

Thank you for your time!