I'm struggling to find if the Corsair H110 280mm radiator will fit in the top of my ATCS 840.
I have a feeling it will but want to double check.
You'll probably have to do some modifications since the brackets that allow for three 120mm fans to replace the top 230mm fans don't support 140mm fans...I think. You might have to wait for another person who has experience since I never use 140mm fans (that's what the Corsair H110 comes with I'm assuming).
I'd have to go check the documentation, but I think some of my Noctua fans are configured to fit in a 120mm standard frame but have 140mm blade diameter. (That sounds illogical but I think the xxx mm is blade diameter and the frame is of course larger. So if you leave frame size constant but make the frame sides narraower, the blade diameter can be bigger.) Maybe that could solve your Corsair radiator cooling problem.
I'm thinking of the H110 due to the noise output and the fact it's a bigger radiator. I live in Spain so the cooler I can get my cpu the better I can overclock it. The H100i will be the next choice if mounting the H110 is too much agro. The Swifttech is a touch harder to come by for me and price is a little more.
Old Guy, I believe you are correct on that. Noctua did make the 140mm fans to fit a 120mm frame.
I emailed Corsair but they claim to have never tested the ATCS 840 with the cooler. Awaiting a reply from Coolermaster.
I also own a limited edition ATCS 840 which has gone bronze due to the sun!