modifying fans

[sendatooli]

well the machine is too loud again! i have sk6's on my cpu's. with the sunon 27cfm fans my cpu's are at 41c. idle and 47c. max load.(2xmp1800's). with the delta 38cfm and a 7.5 ohm resistor on the red lead(5600 rpm) the temps are 38c. idle and 44c. max load. with the delta 38cfm at full blast it is 35c. idle and 41c. max load.

heres the problem: the delta with the 7.5 ohm resistor is still too loud. a 10 ohm resistor makes no difference in the noise level. the fan is not as loud decibel wise, but the "whine" is still present.

so, in an earlier post mekboy mentioned that he runs delta 50 cfm(tall) fans on the 7v. rail. he says it is quiet. well i never had him clarify is it as quiet as a 27cfm sunnon? or does it still whine a little? i wont run on the 7v. rail, but i will use an appropriate resistor.

the sk6's work good, but they require a lot of air.

i just wanted to ask this before i spent $35 on more fans to sit in my "junk drawer".

by the way, the machine is not overclocked and runs fine. i just like it as cool as possible. but not at the expense of my ears. this machine is for audio recording. idealy it should be below 40db. from a foot in front of the case.



thank you,
sendatooli.

[jbell]

sound proof the case - I threw Dynamat in my case and it help cut down the noise drastically!

Metal naturally creates sound - remove that and your sound won't be AS noticible - it will be there but have a harder time resonating outside the case...

[Menardsguy]

I also put dynomat in my case. It helped a lot with the noise, but in the first couple weeks it smelled really bad. Also I think it insulates it keeping more heat inside the case which is bad and if you go to lan parties, I wouldn't recomend it because it weighs a ton!

[M@€$†®Ö™]

Where can you get Dynamat at ?

Maestro

[sendatooli]

i am aware of dynamat, as i work with car audio. i am against using it in cases for the very reasons you guys stated above.
besides, it will not deaden the frequency that the delta fans produce to the extent that i require.


all i would like to know is: has anyone besides mekboy used the delta 38x60mm. 50cfm. fan at 7 volts or with a resistor? is it at least as quiet as a 27cfm. sunon@38db measured at the fan? does it indeed put out 35 cfm. or so, at 7 volts? again, mekboy made this statement. i am by no means disbeleiving mekboy!!!! it is simply that it seemed in his post that he was guessing these numbers. i would like some actual tests of this if possible.

what is quiet to one person may be loud to another. if you have done this and do not have test equipment, maybe you can confidently state that the fan puts out 35cfm+ at 7volts and runs under 40db. at the fan. or you can directly compare it to a sunon or ystech 27cfm.

i just was hoping some one could help out with this. since i have like 20 fans in my "junk drawer" that didnt work out for me. i dont want to waste another $35 on two fans.


thank you,
sendatooli.