quetailion

Its a bit of a weird problem. If I switch my computer on after it wasnt in use for multiple hours, it first seems to start normally. The fans are running normally for a few seconds, then the system turns completely off for like 3-5 seconds and then it turns on again. After that, the fans running normally again. But nothing happens. Monitor gets no signal. Keyboard is not lighting up. No POST beep. Mouse is lighting up though. Usually what I do now is let the system running for a while, then turn it off and then try again. If I'm lucky it works. If not, I need to turn it off and on multiple times until it works. Maybe its worth mentioning that the short power out I mentioned is only happening when the computer was turned off for multiple hours. If I turn it off and on again, there is no power out at all. Also once I get the system to boot up, it runs completely fine. No issues at all. No crashes, no overheating, nothing.

Since my PSU (i guess its my PSU) is causing my computer to not boot probably, I need a new one. I did the method of CPU + GPU + 50 I saw in the pinned thread and got to a value of around 260. I saw the PSU tierlist but there are so many choices. Also a lot of the listed PSUs are not available here currently. My goal is to replace the default PSU that already was built into my computer when I bought it. I dont want to spend much money, since the computer is pretty old already. Any recommendations out of these ones? Thermaltake Munich 430W Thermaltake TR2 S 450W Chieftec GPB-400S 400W ATX23 Sharkoon SilentStorm SFX Bronze 450W Chieftec PSF-400B Other recommendations are appreciated as well. Also since I know nothing about electronics.. will my system consume more power if I use a PSU that can handle more wattage than necessary? Thank you