@
gasolin/
ojoqrom
do not misread this, but: a little bit of lol, after reading your fan layout.
just to go by it in simple terms:
ignore size and assuming all fans have same "flow".
while the 2 fans in the front will produce 200 (%), the single fan in the back, will do 100,
so at least 1/3 of your warm air will just circle around in the case, as the exhaust fan cant move same amount of air.
sure, heat goes upwards/some out the back openings, but usually wont matter much in a (forced) air environment.
so with the top/bottom/rear just "open", you will just have some "turbulence" when the air passes by it,
messing up overall flow (front>back), never close to the flow any 2 fans will provide, even if running at bare min speed (3-4V)
doing ~200ish rpm.
with my 280 rad mounted to side panel, set as exhaust (two arctic P14, later 2 more P14S on outside),
two F14 in the front/at bottom (both intake), one F14 rear/three F12S on top (all exhaust),
the rig is inaudible at low load, with case 3ft next to me
on the desk (5800X/5950X).
the next case will have the rad back on the top, with bottom+front+side all intake,
so i will switch for Silent versions. allows for a little bit higher min rpm/earlier peaking of max rpm.
@gasolin
in general (unless: form>function)
the P are for rad/restricted flow (case that has 'grill/cover", not just a mesh filter),
with arctic stating that the fans (at least for the P series) prefer pull, rather than push (rad), when only using two fans,
and F are better for case/no restriction stuff.
from the last couple builds i did (friends/customers), the pwm ones seem to have less resonance with some cases/panels than the DC fans (3 pin),
when reaching certain rpms (~900/1000 till about 1200-1400rpm) no matter if F or P.
but not the silent versions, guess because they only reach ~800-1000rpm, depending on size/F or P.
but: stay away from any multipack, they seem to have large amount from a bad batch at amazons warehouses (US),
order from arctic directly, or local shop you know doesnt have "old" stock,
as the replacements i got from arctic directly, are now same "age", and still dont click at lowest rpm (dust in bearing) like all from multi packs did (~1-2y).
not an issues getting them, but when you zip-tie stuff to look nice...
pads arent a good idea for (desktop) cpu use, except (thin) graphite (based) stuff.