I have compression valves and have never had an issue before. I forgot to close one of the unused inlets off on one of the GPU blocks and didn’t do any of the things I was supposed to do like only connecting the pump so nothing has power, all my own fault trying to do loads of things at once after a rebuild. I went from air to AIO to full loop over the years and this is the first issue I’ve had.I'm not even a fan of an AIO to be honest as a leak from that and bang, your system is fried but I'm even less of a fan of a big arse air cooler so I go with one.