actually it's best to strike a balance - not too many fans, not too many holes. too many fan - noisy (even with quiet ones), too many holes - dusty (even with filter).

the front and rear 12cm fan plus side panel cpu funnel & pci slot vent is more than enough. the top blow hole is optional. alot will depend on which cpu you are using and how extreme you oc.

i doubt that "too many fan - noisy (even with quiet ones)", currently using 4 case fan (CM Silent LED Fan 120mm x 4) barely hear any sound

using Lian Li PC-G7 (modded by Ianho) can see the worklog code: Black Parade, there u can see i got 4 fan, which is (1 intake & 3 exhaust) or (2 intake & 2 exhaust)

he refers to general situation ... if u aren't using CM Silent fan with the G7 case ,,,

i doubt it could be so silence ... the same configuration u apply into other case ... u might end up with a noisy case ...

i personally used CM 530 ... two fans already killing with CM Silent UV and LED >.....

Very good tips here. I like the tests he did. But hard to smoke my casing, need to clean up the dusts later hehe.

I know for sure the expensive casings will offer superb airflow, but economic ones such as CoolerMaster and icute, i'm not so sure, those will definitely need to be tested.

not general i think, cause he state "even with quiet ones"

& no fan can be silence, i barely hear sound, whisper yes

haha yes i meant the cm led silent type too. i am using 2 for my current case. they are quiet but still audible. it is still miles better than my stock standard fans that came with the case. the point is even if you're using low noise level fans the more you have of cos the more noticeable they are

This post has been edited by kitman: Mar 12 2007, 02:07 PM

Dust will be a problem with too many fans, even slow/silent ones; and airflow suffers quite badly for those when you put filters because they don't have much static pressure.

He used a proper smoke machine-no dust. But those of us with no access to that will just have to deal with cigarrettes/joss sticks/mosquito coil and deal with the dust.


You should join silentpcreview forums bro, I think you could fit in there quite well. For them, even a CM silent LED is considered noisy already. Give them a delta and they'll faint.

lol lohwenli ...... actually i'm not that crazy but my pc for my ht setup need to be reasonably quiet or else how to enjoy the movie? also my room's pc need to be quiet too cos i'm bt over the night - need to sleep.

what i'm saying is look at your needs - if you only oc mildly and in an aircon enviro - there is really no need to install lots of fans - dun go overboard . if just need good airflow as more fan doesn't necessary means better airflow

This post has been edited by kitman: Mar 12 2007, 03:06 PM

that's what we call trade off...

dust is a must, no matter u put filter for it, different is dust will accumulate slower compared to non-filter fan just have to live with it, dust, its everywhere

CM Fan also noisy, dunno what fan i can use anymore if i were them i meant the cheapo ones la

hahaha CM Fan also audible

i guess u need this then:

Zalman Multi Connector 1


enable u to run ur fan on +5V or +12V, surely silent one if u run on 5V if things start to heat up, change back to 12V & have to keep it that way

This post has been edited by E-J@1: Mar 12 2007, 03:21 PM

umm maybe i need therapy ........ joking lo, i won't faint when you switch on those turbo charged delta fans . sometimes i find it hard to imagine my 1yr ago pc actually sound like a table fan on full speed , i can hear it outside my room with door closed

It's a sign of age ler... When I first join this forum, I was a big fan of delta fast spinners... the bigger and faster the better.

Now, anything over 1000rpm = Noisy for me.

OMG i'm getting old! time to join olang tua club

They do better than that, either they dig fan controllers or customise with resistors to get the 'perfect' silent speed. The fans they usually use are pabst or panaflos, the more extreme guys use nexus and another brand I can't recall. So damn silent, hard disk also damn loud by comparision. Oh ya, never mention a >30db fan there-sure got ppl flame/kutuk wan. Worst case also 25db only.

I thought old people's hearing get worse rather than more sensitive No offense.

what it i use 3x 120mm on the top case,3x 120mm at the front and 2x 80mm rear..Is it Good..?

I think you won't wanna use that multi connector with any of the cheapo fans, coz u'll feel no air is moving at all. At such low voltage of 5V, the fan spins too slow and you can not feel any air moving out or in at all. I'm using the Evercool GT365, when I shut down the pc, the 2 intake and exhaust fan still works to move the hot air inside and out of the casing. But, i'm not sure how effective it is since the fans are moving so slow. Mayb it'll be effective with panaflos only.

By the way, I used to visit the silentpc website quite often, but hard to keep up with the budget that those ppl use there. Surely, I'll be happy to get more Panaflos if its as economical as the CM ones.

Oh yah, lohwenli, does the blade design contributes too ? Coz I tried once to construct a fan using those tamiya motor, i use cardboard and bend it to form the fins of the fan. I notice that, if you bend the fins differently, the air flow is totally different. Its also a trade off coz when the airflow is higher, the noise from the air moving is also audible too. Is it true or it's just co-incidence in my experiment ?

Things that effect the power of a fan
-blade pitch (how sharp are the blade angles, sharper will result in more airflow but greater resistance to the motor)
-blade diameter (the bigger the better)
-blade count (more blades means more airflow)
-rotation speed-this one everyone knows

Thera are other factors but these are the main ones. So you are not far off the mark. Noise increases proportionally with airflow, so high airflow fans could never be as quiet as low airflow fans.

slap two Thermaltake Duct Mod on the side panel (each side one duct mod)

this way, the air will be directed towards the mobo, not straight to the other side of the case

OCZ,

guys i'm not too knowledgable in fans and air flows but i came across thing on the web

http://www.xoxide.com/computer-cooling.html

hope it can solve your problems. i think it make sense..

regards,
point blanc

design of a fan is a very complex thermodynamics and fluid mechanics situation if you were consider it from every aspect

mmm... if you wanna run high rpm fans and scared of the noise... use rubber gromments. It cuts down alot of the vibration caused by fans and therfore cuts down significantly on the noise level. Better yet, (i'm still looking for the link) create a vacum in your case. What i mean is that, close every hole in your case except for your intake and outake areas. This create a suction effect jus like a vacum.. once i have found a link i'll post it up.. kinda interesting...

This post has been edited by Xtreme_Hightz: May 20 2007, 03:37 PM