Some here know I hate CLCs. They tend to start failing after 1-2 years of hard used .. the higher the CPU temps the shorter their life.
Don't confuse AIO and CLC. AIO is parent group and CLCs are a sub-group of AIO. AIOs have threaded fittings, fill port, copper radiators and flow more coolant so we can cut hoses to length we want and replace components as needed. CLCs are made and filled at factory with no provision to repair or replace components as needed, not even a fill plug for topping up coolant. AIOs that are not CLC are a big step up from CLCs but still not as well built / don't cool as well as even a mediocre custom loop will.
I have a be quiet! Silent Loop 280 AIO and love it. While I'm not pushing an extreme amount of heat at it it has worked extremely well for about 2 years now. I did top up the coolant level a couple months ago. It was not very low, but a little which is to be expected in a couple years of use. Silent Loop has copper radiator, threaded fittings and pump rated 72 L/h (Asetek don't publish pump flow rate but it's about 41 L/h).
There is a "B-Grade" Silent Loop 240 for £104.99 It is also copper radiator, threaded fittings, pump rated 72 L/h, etc.
https://www.overclockers.co.uk/b-gr...perior-liquid-cpu-cooler-240mm-bg-10g-bq.html
While I have not used any Eisbaer coolers, they are Alphacool's own AIO line, and they make be quiet! Silent Loop AIOs.
Eisbaer LT240 is £84.95. It is also copper radiator, threaded fittings (& quick connect too), pump rated 72 L/h, etc.
https://www.overclockers.co.uk/alph...water-cooling-unit-240mm-11445-hs-005-ac.html
If you could fit 360mm radiator, the Aphacool LT360 is £99.95. Same as above.
https://www.overclockers.co.uk/alph...water-cooling-unit-240mm-11446-hs-006-ac.html