Phew. OK.
After
a lot of hand-wringing, I finally decided to move my HDDs out of the Cerberus into an external enclosure and replace them with a second 240mm radiator. The external enclosure project has not gone according to plan, but is functional now (mostly) - it's just super ugly and I can't close up the case... anyway....
Getting that second rad in was a real nightmare and getting everything assembled (and disassembled and assembled and disassembled again) was not great, but I'm happy to have gotten it done. Like with the
previous iterations, build order was critical. Pretty much had to go from bottom to top, while pre-running that rear tube.
I pretty much had to tear down almost everything (gave it a light flush as well!) and rebuild since I had to change a number of tube runs. Also, I completely botched my angled adapters order, and given the opportunity, would change almost all of them. Anyway, I was anxious to have everything back together and made it work, but I really would have loved a 90degree adapter coming off the pump to GPU, and a second 2x45 90degree adapter on the top radiator (the one in use I originally bought for that, but I didn't take the fans into account when trying to angle/snake the tube run from bottom res to top res, so I had to move it. Also, my "plans" for a proper drain tube did not go according to plan at all, so I'm pretty much hosed (ha ha) there. Previously, I just drained everything out the top of the res, so I'll just have to continue doing that. it sucks, but it's not the end of the world, I guess.
Also, going in, I was 100% certain I would not be able to get 4 25mm fans in there (based on measurements), but with how the Hardware Labs GTS radiators are shaped, I had
just enough room to slide in the front radiator.
I haven't had a chance to get to any benchmarks compared to the single radiator, so I'll have to report back on that. But anyway, here's a couple better photos of the build. I think it's pretty clean, all things considered, if not especially photogenic.
Here's the cable nest, ha. You can get an idea of the tube run behind the fans - it just snakes down to that rear bottom rad connection.