140mm or 200mm fans CORE x9 EATX?

[vESP]

i own the TT Core X9 e-atx case, the case comes with some lowish end 120/140 fans and 1 200mm fan that is operating fine and is being kept.

according to the case specs from TT i can have up 6x 140mm or 2x 200mm on the top.

Which would be the best for cooling? i found the 1x 200 in the front  has been doing a great job and pushes alot of air. but would the 140mm be a better choice due to numbers and the larger pressure pushed? i would be using r3 from fractal design since they are 6$ at a local pc store.

 

another question if the 140mm is the best or isnt would i be able to use a PWM hub to slow the r3 fans down to about 800rpm? or even just to mass power them on a hub as my motherboard only has about 3 system 4pin for fan. 

 

[Cyracus]

200mm fans can push plenty of air and since they can do it at relatively low speeds they're very quiet. As far as if you could get better cooling by using 140mm fans, based on my personal testing I'll say no, most of your cooling potential comes from getting air in and out of the case, pressure plays a role, but is a minor factor in my experience

[vESP]

hmm, so what would you suggest? 3x 200mm [ new: 1x 200mm front & 2x 200mm top ] ? since im going to be adding acrylic sheet to basically chamber the cpu and gpu etc in the top half and all my hdd and PSU etc in the bottom