I'm back with another one, this time it's called 'how to reduce that awful whining effect with case grills'.
Ever bought a CM case and put intake fans on the grills, only to fire it up and hear that awful siren-like whine?
Look no further.
Here's what you'll need.
- Modright Filterright Case Filter in the size that you require. E.g. a 120mm fan on a 120mm grill would require a 120mm filter, you don't say.
- (OPTIONAL) Your fan filter of choice. I chose the Silverstone FF-121 because I got a ton of them on the cheap, and they're pretty to look at whilst being able to filter quite well.
Do be advised, that this mod doesn't entirely shut your rig up, just turns down the level of whining and deepens the pitch so it isn't half as annoying. If anything, airflow is more directed as well, after the mod.
Step 1: Prep the area you're going to work on. Clean off any dust and grime, or paint over any rusted spots and allow to dry.
Step 2: Grab your Modright Filterright filter. You'll see that the actual filter is mounted on an outer ring via four small screws.
Step 3: Unscrew those screws and remove the filter panel from the outer ring. You may choose at this point in time, to keep or to trash the filter. We don't need that now.
Note how the ring forms a shroud around the fan:
Step 4: Mount it this way on your casing: (Outside) SST-FF121 Filter > Case Door > Modright Ring > Fan
Modright provides a set of four threaded screws with nuts on them already, all you have to do is to push the screw through all those layers above, and then mount the nut right at the end (if you have closed flange fans like mine) or tighten the nut on the inner flange of the fan, for open flange ones.
Step 5: Admire your results. If done right, it should look like this from the outside.
Once again be warned that your results may vary based on filter used (or none at all) and type of fan used. This mod shut my AVC DS12025B12H up a considerable bit, but weren't so effective on the San Ace.
Additionally if your case is in need of some extra pressure, this helps to pressurize the airflow from your fan. The Filterright ring acts as a mini shroud, whilst the FF121 is known to have a small bit of directional properties.
If you're going to be doing this on the convex grills (rear exhaust and front intakes of a CM chassis), then you may want to consider purchasing a Silverstone FF-122 instead for its entirely flat surface. The FF121 has a ring on its filter surface which won't play too well with the extruded grills.
For convex grills such as the ones you'll find on the intake end of a CM341, you'll want to mount them in this order:
(Outside) Case > SST-FF122 > Modright Ring > Fan