I'm scared to change the Low clock to High clock... I have put 2 huge 12 cm fans over the radiator, but there is no easy way to monitor the temperature besides sensing with your hand, right?
Also, it will probably be obvious but I suck at DIY: should the fans blow cold air into the radiator, or should they suck hot air out of it? On the photo on the first pages it looks like one is sucking air while the other one is blowing. Is that correct?
Thanks for your advice and Happy Hashing
1 in 1 out seems to be the best, its the only config where the fans don't fight each other at the boundary.