I could use a 240mm AIO WC kit for my 3600. This R5 1600 95W stock heatsink just isn't working out. My Rosewill Magnetar case has room for mounting a 240mm rad in front, according to specs. (And a 360mm, if I remove the 5.25" bay, but I have a BD-RE drive in there, that I don't want to get rid of.)
Will trade my R5 1600 (used, working, that came out of this rig), for $70 Paypal, that I can use to order a CoolerMaster ML Lite 240mm RGB AIO WC kit (currently $54.99 after promo, for like 24 more hours). ($70 being enough to pay for shipping the R5 1600 out to you too, because I'm flat broke right now.)
Otherwise, without the WC, I'm going to have to sit out the rest of the PrimeGrid race, my CPU got to 99C, and stayed at 94.5C, even after reducing my load to 40% CPU cores (4 threads of PrimeGrid) in BOINC. Ambient temps is like 85-90F in my computer lab. At least I have some fans blowing on me.