Cooler Master Praetorian 730 / Cooling Question


Senior member
Aug 28, 2004
i'm building a machine in about a month for a friend. i'm getting him a cooler master praetorian 730 (rc-730-ksn1 black), and have a question about it's cooling. it has a 120mm intake on the front, two 80mm exhaust on the back, an air duct on the side, and an i/o panel on top. now i read the air duct on the side can be taken out, and a 120mm intake fan can be installed. also, the top i/o panel can be removed, and a 80mm exhaust fan can be installed.

now, i don't know much about negative pressure inside a case caused by improper fan placement, but would adding those two fans cause any problems, or would they help?

secondary question, would they help enough to justify their installation, or will it be a minimal, if any, decrease in case temperature?



Jun 15, 2001
I took the air duct out of mine, as it wouldn't fit with my CPU cooler... I have tried it both with and without a 120mm fan instead and there was actually no difference in temperature.

The reason for this could be that my Thermalright XP120's fan faces the side opening anyway.

I haven't tried a fan in the top as an exhaust because I like having the i/o ports. Personally I find the cooling to be very efficient in the case anyway and I would not like the extra noise another 80mm fan would generate.

A friend of mine has the same case with the Zalman CNPS9500 CPU cooler and has ended up with the exact same configuration of fans as me.

If you have some spare fans lying about you could always experiment...

Hope this is of some help.


Elite Member
May 1, 2001
Generally the std. front and rear fans will be adequate for that size case. Only change the cooling setup for objective reasons: std. fans too noisy, temps too high, etc. I'd like to see them make an oscillating fan or one with a rotating grille to use as a mixing fan inside the case to prevent dead-air spots.



Junior Member
Jan 25, 2006
I have that Praetorian 730 case and did try with and without a side 120mm fan. My temps went up 2 degrees with a side fan.