Help me with pressure?

[OnionRings]

Need some assistance, got the corsair 200r case, back fan on, front not (gonna buy a molex to 3 pin cable to fix that) so im creative bad pressure, about to buy a molex cable from amazon so I can power my other fans and wanted to know what else to grab, I was gonna grab some cheap case fans. As standing now I have 2, 1 intake 1 exhaust that came with the case, plus my cpu cooler + my psu drawing air FROM the case, so how many more fans should I grab? Jayztwocentz recommended putting front and top fans intake and the back exhaust to create positive pressure keeping dust out (yes my front fan is filtered, but the top wouldn't be, so I'd draw dust in from the top) what are your guys thoughts?

[Moonzy]

i'm assuming you're running a moderate tdp system (something like core i5 6500 paired with gtx 960)
if it possible to raise the bottom the case slightly off the ground and make your power supply draw it's own air

then you just have to use the two stock fans and you'll do fine

for positive pressure you just have to run the intake fan at a higher rpm

 

and i dont recommend you use molex to control it as it'll be very loud, try to control it with your motherboard if possible

use fan splitter if you must

[OnionRings]

23 minutes ago, Moonzy said:

i'm assuming you're running a moderate tdp system (something like core i5 6500 paired with gtx 960)
if it possible to raise the bottom the case slightly off the ground and make your power supply draw it's own air

then you just have to use the two stock fans and you'll do fine

for positive pressure you just have to run the intake fan at a higher rpm

 

and i dont recommend you use molex to control it as it'll be very loud, try to control it with your motherboard if possible

use fan splitter if you must

What's a fan splitter? And how do I control fan RPM? Btw its just an i5 6500 build no gpu yet. Also my case is way too short to draw in air at the bottom, the amount of space is incredibly small.

[Moonzy]

45 minutes ago, OnionRings said:

What's a fan splitter? And how do I control fan RPM? Btw its just an i5 6500 build no gpu yet. Also my case is way too short to draw in air at the bottom, the amount of space is incredibly small.

you can lift the case up with books or what not, so there's that

 

fan splitter is a cable that splits one fan conection into two, so you can connect two fans on one motherboard header

http://images17.newegg.com/is/image/newegg/12-162-026-TS?$S640W$

[OnionRings]

Alright I purchased a fan splitter, when it gets here I'll install it and flip my psu over and get some height on my case feet. About how many inches should be under the case for adequate air flow to the psu?