Help! Should bigger of 2 case fans be the exhaust or intake?

[shurato]

I am in dire need of advice. I am trying to cool my duron 600 at 950 and i have only a stock case fan doing intake in the front. I want to order a Sunon 80mm high output and a Sunon 80mm Quiet case fan for my INWIN Q500 Fulltower. Where should i place these fans and is this even enough? I'd like to have a quiet case if possible but i dont know if this is enough for a Fulltower case for the o/c'ed Duron. I also plan on ordering the FOP32-1 with the order from 2cooltek but I need to know what to do fast so i can order them quick (they dont have online realtime inventory).


p.s. I currently have a small desk fan blowing into the open case and the temp on the cpu is 33c according to Sandra with the stock hsf yeah i know, its ghetto but its a temporary solution. I'd be amazed if i can reach this temp with proper internal cooling.

 

[shurato]

^__ anyone? id like to order from 2cool as soon as possible. thanks

 

[Technonut]

I have my full tower case setup with equal intake/exhaust. (2 120mm Papst fans) One is in the lower front, and the other is a top blowhole in the rear. It works very well for me. I would imagine that your greater CFM fan should be in the front to cool your cards & mobo, and the lesser one exhausting in the rear. Your power supply fan will exhaust some air, but mainly works to cool the power supply more than effective case exhaust, depending upon the model.

EDIT: It would not take much effort to switch your fans to see which setup works better for you. I would just have the exhaust fan as high in the rear as you can place it, or even better, place a top blowhole in the case.

I order from 2CoolTek often, and usually if there is an out of stock item, the "add item" button will not be available.

 

[Fardringle]

I'd put the high output fan in the front of the case, cut a hole in the top of the case (or drill holes to make it look better) just above the CPU and put the 'quiet' fan there...then if you still want to use the stock fan, see if there's a place you can mount it on the back of the case to help draw off some of the heat from your AGP card and Power Supply... (the top and back fans should blow out, and the fan in front should blow in)

 

[tonyou]

Just want to voice my opinion here, I think having more exhaust CFM in the back of the case is better...

Tony

 

[soundsation]

I am agree with Tonyou

 

[Moving Target]

Not sure it would matter, your not going to pressurize it or create a vacum in your case. If your intake fan has less CFM than your exhaust fan, it will draw in more air from somewhere else. And if it is reversed, it will blow air out somewhere else if the exhaust fan can't keep up. JMO!

 

[shurato]

The INWIN Q500 has poor ventilation in the front Unless i drill holes or cut that metal portion of the front case I will not get decent airflow. Right now with a cheap stock fan i can barely feel the airflow coming in at all when its connected to the front. So i'm thinking that i should go ahead and put the larger fan in the front and put the silent sunon 80mm in the back so that might even help with the sound levels? Should i go for the high rated sunon 80mm or the regular 80mm. I think the decibal difference is only around 4 decibals...would i notice a difference?

 

[atomicbomberman]

hmm.. the most ideal setup is to have the same amount air moving at the same time. Means that you want to have the same type of fans and the same number of fans for intake and exhaust. It is true that if one side moves more air then the others, it'll draw more air from else where, but there will still be some air pressure plus by forcing the fan to draw air elsewhere, you're screwing up your case air flow (directional). That's why people round their cables and stuff, so you have a direct air path from intake to exhaust.. kinda like a jetstream.

For my setup, I have 2 Sunon 80mm in front, and 2 of the same fan in the back. So I have a constant air stream all the time.. it helps, since I'm moving almost 80cfm of air at any given time.. it actually feels like a wind tunnel in there.. loud as hell though =(

 

[shurato]

Ack, well i already ordered my goods from 2cool, this is what i got, I got a 80mm Sunon high output fan for the intake since the air flowing IN is weakened by a poorly ventilated front part of the case and I got a 80mm Silent Sunon to work with the power supply as an exhaust. I figure this was the right choice for me to equal and balance the amount of air flow with the intake and the exhaust. I also wanted to minimize the amount of sound. Was this the right choice? I might think about adding a hard drive cooler for my 30gb 7200 rpm drive that has my O/S and programs later on. Also i purchased some artic silver.

 

[Sesopedalian]

I have three fans in the front of my Supermicro SC750 case and two in back, and it STILL sucks air in the vents on the side. So, it appears that exhaust is more "efficient", and follows that in most situations air will still be drawn in through case vent slots.

 

[inquis]

I have exactly this same setup, and I ordered from 2cooltek as well

What I got were one high output fan up front sucking air in and one quiet fan in each of the two blowholes in the back. Make sure that the PS fan is sucking air out as well.

Also, get some of those little black self tapping screws from 2cooltek to screw the fans in to the case. They work beautifully.

-inq