As stated in the title my PC suddenly completely shuts down as if i would lose power. I am pretty sure that it is the Power supply but i wanted to ask if it even is possible for a CPU or GPU to just let the whole computer lose electricity before i buy a new PSU
I had pretty much this same issue recently. Didn't matter if I was playing a game or it was sitting idle. Eventually it stopped turning on. I was able to confirm the PSU as the issue by testing it alone (still wouldn't power on just jumping the power on pins). Coincidentally mine was also seasonic. It was under warranty so they sent me a replacement and I haven't had an issue since.
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I had pretty much this same issue recently. Didn't matter if I was playing a game or it was sitting idle. Eventually it stopped turning on. I was able to confirm the PSU as the issue by testing it alone (still wouldn't power on just jumping the power on pins). Coincidentally mine was also seasonic. It was under warranty so they sent me a replacement and I haven't had an issue since.