bunch of questions

[superrican]

okay , my first question is about the Fans , right now i have a 120mm as an exhaust and an 80mm on the side of the case , as of now they are both running at full blast and are pretty loud , beyond being loud , i know once i get the black ice 240 i will have to add 2 more 120mm's , i was thinking buying a fan speed controller , how many fans should i use ? or should i take away the case fans or just leave the exhaust?

second question is , i was reading my graphics card box and it was saying it recommends a psu higher than 400w , im running two of these graphic cards , so im thinking im going to need a Greater psu , also with the fans and the pump , i was thinking of something of 700 and above ,what size psu should i buy

[ibmkg]

Two 120mm Fans for exhaust are overkill. You are creating somewhat vacuum. Reduce it to one that will do the job just as good.

Since a vacuum is being created, the 80mm fan could barely do its job. Assuming that 80mm on the side is meant to cool down a vital component, it would merely cancel out the ‘vaccum effect’ with little effect of blowing air to the component.

For the PSU question, Asus website has a calculator for it.

http://support.asus.com/PowerSupplyC...Language=en-us

[superrican]

what i mean by adding 2 more 120's is on the radiator , i just have one 120mm on the exhaust as it is right now

[superrican]

interesting , the asus calculator says i only need a 350w psu ,

[billbartuska]

Originally Posted by superrican

....my first question is about the Fans

second question is...what size psu should i buy

When you talk about fans, please give the CFM rating of the fan. Just saying 120mm, 80mm, etc. tell nothing about how much air the fan can actually move.

Also be aware that a fan will only perform at it's rated CFMs if it is working against zero pressure. What that means is that a 100 CFM fan pushing through a radiator will not be moving 100 CFMs...not by a long shot.

As for what fans to use with your WC setup:
For the RAD; Fans with CFMs that provide the air flow the RAD needs to remove the amount of heat you need removed, at the water flow rate the rad sees. How do you determine what hese numbers are? Well here's one way http://www.xtremesystems.org/forums/...d.php?t=151627

For the case; Total CFM rating of all intake fans should be about equal to the total CFM rating of all the exhaust fans (including PSU and Radiator), and provide sufficient air flow so that excessive heat is removed form the case. This determination is greatly simplified by mounting the radiator outside the case (on standoffs) and using separate fans to supply outside air to the rad. (see attached)

What size (I assume you mean watts, not inches) PSU should you buy?...How much money do you have?...Spend it all on a PSU.