I built my current loop about 2 months ago. I am beginning to realize that its not the optimal setup for airflow or efficient use of space. Loop order ATM is: pump->rad1->rad2->cpu->gpu->res. First 2 photos below show current layout. As you can see Rad1 (right after the pump) has 2 fans in pull and its kinda stuck with its back against the HDD bays. There are ventilation holes in the walls of the HDD cage but I suspect they aren't enough especially since there is no space between the two. Also that rad is just dumping its heat back into the case.
I'm considering mounting a 2x120mm rad on the back of the case externally with a radbox. The dual rad in the roof will stay (hole cut in the roof of the case for it to vent) and I would like to mount an additional 1x120m rad in the front of the case where the 5.25" drives go (see pic 3). I am currently unemployed due to injury so I really cant be spending much money on this... I already have lots of extra tubing, new coolant (clear UV-blue) and the extra 1x120 rad (and a million extra fans).
Pic 4 is a 2-minute Paint diagram of how the new loop should work and apoximate location of the pump and res.
New order: Pump->Rad1(roof)->Rad2(rear,ext)->CPU->Rad3(frnt)->GPU->Res
Please give any input or advice!
PS: at the same time as the rebuild i will be flushing the system to use the new coolant. from what research I've done it seems its best to use distilled water to flush the system. Providing the tubing (all Tygon) isn't all grimy (Ive been using Feser One coolant for the last 2 months) can it be reused?? Thanks