You probably won't need two exhausts unless you're overclocking a lot, even if exhausts are the most effective way to achieve increased cooling. Try using the two included fans for the front intake, at 5 or 7V through the front controller. At least at 5V I can't hear mine and they do their job in that position. I have similar components as far as heat goes and just one 140mm fan at 700 RPM is enough even for lengthy gaming sessions. I'm using one set of the black silicone spacers that also came with the case to get a small distance between the exaust fan and the vent, which slightly lowers the amount of air going through. The NF-P14 FLX should blow a quite similar amount(possibly just slightly more) of air as the TY-140 I use at the exhaust around the same speed. I don't know for sure if the NF-P14 FLX starts at 5V but I think it ought to, becoming a possible candidate to connect to the fan control also. Or try its included adapter that says 750 RPM perhaps. Should be enough outside heavier overclocking.
what temps do you get for idle and full load?
with the stock 2 fans in their default positions at 12V my computer is idling around 30C and with prime95 gets to mid to high 50's. with intel burn test its mid to high 60's. room temp is 20C and everything is at stock speeds. temps seem higher than they should are they not? HWMoniter shows a few degrees warmer than real temp on average but at idle both show the temps constantly changing every second between 26C to 30C by a degree or two. is this normal?
do you have your TY-140 hooked up to the fan controller? what speeds does the fan run at when set to 5v or 7v. i was thinking of getting a second one for a case fan but wasnt sure if the pwm would get in the way.
My favorite 140mm is Noiseblocker NB-BlackSilentPro PK-1 140mm x 25mm Ultra Quiet Fan - 700 RPM - 9 dBA
, in my case is enough to cool a xeon e3 1230 on an AXP 140, but the fan is very quiet imo, i also own 2x PK3 (1600rpm version) and they move a lot of air, but to me PK1 is very good as it comes stock in terms of noise n cfm.
noiseblocker isnt available in my area. i was considering them before but importing wasnt worth the cost.