We need more details. Does it give an error message? Do any of the lights light up on the motherboard? Does it just not react at all?
Also try reseating ram and cpu. Make sure the cpu pins aren't bent.
Hello, i had this problem once, where my racing wheel would disconnect randomly and i found out, that it is because the psu in my old pc was not powerful enough to power everything. It works fine in my new pc. Are you using a prebuilt by any chance?
All anti aliasing options are off, and like i said, i tried to turn the settings down as low as possible, and i still get the same fps. vsync is also off.