EeNuf

I have a crappy PC that i built some years ago (i3-7100 gtx 750ti 8gbRAM 500wpsu msi h110 m a pro m2 motherboard). It worked fine until a few months ago when it started to reboot when i would play games with good graphics. I would be playing Warframe on high settings with 70 fps and the pc would reboot itself out of nowhere(I played on these settings before and everything was fine). So i bought a new motherboard, because i was told the old one couldnt deliver as much voltage as it used to, this time it was msi h310m pro-vdh plus. I installed everything on it and when i pushed the power button my pc turened on for 2 seconds and then it shut off. I tried everything to fix it i swapped my ram around i did that reboot with a battery thats on the motherboard, i unpluged evrything exeps psu. The problem is with the motherboard because i tried to boot with my old one and it worked. The new motherboard is in perfect contition from the outside, no pins bent no nothing. Please help