Quieting the Delta 38CFM Fan

ED Note: I have not tried this yet, so if you do, tell me how it goes –

I have an Alpha PAL 6035 heatsink with a 60mm Delta 38 cfm fan.

This combo was mounted on a slotket to cool a Celeron 600. The motherboard was the Abit BX6R2. I found it to be way too noisy so I put a 26 cfm fan on it.

Now I have a nice new Asus CUSL2-C Black Pearl and a new P3-1000 to mount the heatsink on.

While I waited for my Black Pearl to be shipped, I went about getting ready for it by figuring out a way to cut the noise from this very effective 38 cfm fan.


These are the materials you will need – besides the heatsink, some silicone, shorter screws, some tape and a razor blade for trimming the silicone.

I got 4 3mm x 40mm long screws for the heatsink – just long enough to hold the sheet metal shroud on.

HS Screws

I could only find socket head cap screws in this length, but it does not matter which kind you use as long as they are the correct length.

I put the shroud on and simply tightened the screws until they were secure. I then took some clear 100% silicone caulking and put a dab on each screw head.


I used a good sized blob, about 3/8″ in diameter, enough to cover the screw head entirely and keep them from getting loose.


I then put a small dab on the 4 corners of the fan, enough to protrude through the holes and mushroom a little.


Using 2 short pencils as spacers, I placed the fan on top of the 4 dabs of silicone on the screw heads.


This leaves about 3/16″ gap between the screw heads and the fan – nicely filled with silicone.


I let it dry 24 hours and pulled out the pencils. The fan is very secure but will not transfer the vibration through to the heatsink.


A little trimming of the silicone at the corners,


and I put a wrap of black electrical tape to cover the gap between the fan and the shroud. The vibrations produced by the fan are not transmitted thru the heatsink.

Looks great, but best of all, the fan is very quiet.


Ed Chapel

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