Akhiruzzaman Habib said:
So, I want to overclock my CPU and I am a beginner. So, should I go for a cheap custom loop (My choice Is EKWB-Kit S240) or an AIO liquid cooler?
As a BEGINNER, I suggest you go with an AIO cooler. Yes, a custom loop is better performance, but a custom loop is aimed at more experienced builders. Besides, installing a AIO cooler is much easier to install and safer, though it could be louder if you don't replace the fans if you have a noisy liquid cooler.