That's likely an issue of tuning or the thermal paste is dried out or something. No particular reason the fans should have to go that hard immediately. The fan

That's likely an issue of tuning or the thermal paste is dried out or something. No particular reason the fans should have to go that hard immediately. The fan speed should really be a function of the liquid temperature more than the cpu temp. The cpu temp will fluctuate a good bit, but the water temp goes up quite slowly under load. Is it an AIO, or a custom loop with a resevoir and such? But yeah, short story: water cooling is very rarely worth it in a consumer pc. But it shouldn't sound like you're describing, it's just overcomplicated and too expensive.