SOLVED Which Fan?

[Kryten]

I have a full tower case that has provisions for 2 std 80mm fans side by side above the PSU I have room for a further 2 fans also side by side under them.
Question:
Do I modify the case so I takes 4 fans or do I put in 1 big 1, what do you think?

...I've just looked through the local hardware catalog and they have the following options:

4 x 80mm - 30CFM, 35db, 12w, 2800 rpm, 80mA, 240VAC @ $33.47 each - $133.88 (4)
4 x 80mm - 34CFM, 32db, 2.4w, 3000 rpm, 200mA, 12VDC @ $15.28 each - $61.12 (4) or do I go
1 x 150mm - 230CFM, 53db, 40w, 3400 rpm 240mA, 240VAC @ $79.97

Also is it worth moving the PSU up to the top of the case and having the fan in the middle???

My mind is going crazy with posiblities, would it be benificial to duct this air over the CPU heat sink and blow

I also have enough room at the front of the case for
1 x 120mm - 105 CFM, 47db, 17w, 3000 rpm, 110mA, 240VAC @ $33.47
or at a sqeeze 1 x 150mm as above.

 

[Da Whip]

Newby2OC,
I just finished bulding a new system and had a similar dilema w/ fans. I originally thought more was better and had as follows;
1 -120mm Sunon 108cfm in front
1- 120mm Sunon 108cfm on side blowing on video and CPU
1- 120mm Sunon 108cfm on top as blow hole
2- 80mm Sunon 47cfm on the top rear
1- 92mm Sunon below PSU sucking air away from HSF
It sounded like a damn vacum cleaner. ( it was keeping things cool tho )
Well the family thought this was too loud and I was getting a constant ringing in the ears.
I then purchased some Panaflo 120mm 69 cfm 30db fans and the noise level dropped dramatically. My system temps did not change at all. These seemed to work as well w/ less noise.
I also think you can get them alot cheaper online.

 

[Kryten]

which direction where these going
1 -120mm Sunon 108cfm in front <-----
1- 120mm Sunon 108cfm on side blowing on video and CPU
1- 120mm Sunon 108cfm on top as blow hole
2- 80mm Sunon 47cfm on the top rear <--------
1- 92mm Sunon below PSU sucking air away from HSF

The last thing I want to do is make it noisey as it will be on 24/7 but I guess the question I'm asking is how much is enough???

Thanks you gave me some locations I hadn't even though about, but I would still like to know roughly how much CFM in and out I saw else where in here a rough ratio but not a quantity.

 

[Da Whip]

Newby2OC,
for the diferent fans get the quiet version and not the high CFM. They will cool as well w/ lees noise. Panflos are the best.
As far as what direction the air flow;
Front blowing in
Side blowing on CPU/Video
Top blowhole sucking out
Rears sucking out.

 

[Kryten]

Da Whip (Apr 08, 2001 09:34 p.m.):
Newby2OC,
for the diferent fans get the quiet version and not the high CFM. They will cool as well w/ lees noise. Panflos are the best.
As far as what direction the air flow;
Front blowing in
Side blowing on CPU/Video
Top blowhole sucking out
Rears sucking out.

Ok if I understand this correctly, air movement is all that really maters not so much the volume

 

[Kryten]

Thanks to all that contributed....

 

[stool]

I'll just add one thing. Stay away from the 150mm fan. At 58DBa it'll drive you nuts. I built a heavyduty radiator and cooling setup where I used a 160mm 120vAC fan, and while it almost lowers temps below ambient, you don't want to be in the same room with it, Several layers of styrofoam, sound deadeners and carpeting have done little to quiet it down.

 

[Kryten]

stool (Apr 10, 2001 09:09 p.m.):
I'll just add one thing. Stay away from the 150mm fan. At 58DBa it'll drive you nuts. I built a heavyduty radiator and cooling setup where I used a 160mm 120vAC fan, and while it almost lowers temps below ambient, you don't want to be in the same room with it, Several layers of styrofoam, sound deadeners and carpeting have done little to quiet it down.

thanks stool the dbA on the 150mm is 53 but I still feel this is to high, most people have suggested I don't need that much air anyway so I will probably go with the combo of a 120mm + 80mm both in and out