With only 2x 3.5" hdd, If it was me, i would sell the case with all fans, and get a lian li 215, mod the GPU, and get 3x sw3, f140mp for the front, and use the tc14pe. Considering the undervolt on the GPU, and the 10400f with the tc14pe, you should be able to run all fans around 500-700rpm under high loads (stress tests and benchmarks excluded), and never touch 70ºC, with 20-22ºC ambient.Oh, I do intend to deshroud the GPU and strap a pair of 120mm fans (most likely F120MPs). I just need to figure out connecting them.
I use Argus to control fans, so I can plug the fans on GPU to mobo and control them via Argus, I think, it enables fans on mobo headers to react the GPU temps (it's how I connected 2 top intake fans on Thetis).
The temps are pretty solid in Thetis, to my surprise, it's not really known for good airflow. All my fans are Thermaltake Toughfan 12s, the CPU does 60-62C in Borderlands 3 with fan at 1000-1100 RPM and the GPU is lightly undervolted, hits around 70...but the GPU fans are just too noisy and there's resonance and rattling from the case, even though fans in it are very quiet. It's starting to annoy me.
The reason I use the LFII for CPU is simply to reduce the in Thetis (also, it has a wonky CPU airflow and the AIO helps). It does a nice job but it might not be optimal for Define cases, the only place I see for it is top exhaust...TC14PE might be a better fit. It's pretty big, though, I've gotten used to clean motherboard.
If I do use a bottom intake, it will surely blow lightly, on low RPM. I'll probably try without it, to see how it goes.
What do you suggest for fans? Where should I put those 3 P14s Reduxes and what more should I get? I was looking into Phanteks F140MPs...
I should maybe replace the fans on TC14PE too if I use it, I have the old version fans...
Remove drive cage, and install both HDDs directly on the floor, with thick rubber washers and sticky velcros (that should absorb all the vibration).
It's a cheapo case, but in this situation, is probably as good and silent as you gonna get, coming from case side.
By the way, are you getting a really good price on the f120mp, because they go for 20 bucks a piece, and arctic p12, while they have some cuality control issues, they're incredibly good for the task at hand (which is a fairly fin dense radiator)