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Looking for new radiator fans

post #1 of 13
Thread Starter 
I'm currently using some AP-14's on a controller running around 700-1000RPM depending if I'm aiming for silence or gaming. However, they are still audible at even 700RPM to me and sometimes make a weird resonating sound. Putting my ear up to a single fan also has some motor noise that I'm looking to get rid of. I know a lot of people stand behind these fans, but all 6 of mine are similar sound wise and are not silent. I was wondering if there is any other fans out there that are silent on a controller and maybe even able to be turned up to really high speeds for overclocking fun.

I'd also like to see about upgrading to 38mm thick fans as I have the room. I hear they can push more air at lesser speeds to run quieter. Problem is, where do you find good quality 120x38mm fans?

I do like the fan in my X-650 Seasonic PSU which I believe is some variation of a San Ace fan. Do they sell the same exact fan somewhere and I could just slap those on my rads?

Edit: Radiators are RX120 + RX240.
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post #2 of 13
Performance PCs 120mmx32/38/76mm fans

Good selection of thicker fans at Perforance-PCs, I like Panaflo fans, you can also get those from newegg (Made by Rexus now). They will be much louder than AP-14s at full voltage but can get pretty quiet when you undervolt them. I don't think you will find a fan that will be silent if you put your ear up to it, if you do it probably won't do much on a radiator.
post #3 of 13
Thread Starter 
Is there a difference in the fan between the Panaflo L1 and M1 besides one will allow me to spin it up faster? If they are the same sound character at say 700rpm then I'd prefer the M1 for when I do benching.

L1
http://www.performance-pcs.com/catalog/index.php?main_page=product_info&cPath=36_403&products_id=876

M1
http://www.performance-pcs.com/catalog/index.php?main_page=product_info&cPath=36_403&products_id=1227

Also found some San Ace ones on their site.

http://db.sanyodenki.co.jp/product_db_e/coolingfan/dcfan/dc_fan_detail.php?master_id=795

Not sure what it means by ribless as they have non-ribless versions as well. It mentions that it will run 1300rpm at it's lowest voltage of 10.2V, but I would think it would run lower. My AP-14's spin up at really low voltage on my controller and turn about 300-400RPM minimum, but are essentially useless lol.
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post #4 of 13
I used the 86.5 CFM Panaflo in the past for a WC setup. Mine would require a minimum of ~7V to start but would operate at as low as ~5V. I am assuming that the lower speed Panaflo will allow for slower speeds when undervolted but I am not 100% sure on that.

One other thing to consider is adding a shroud for your radiator if you don't have one already. The motor hub in the center of the fan blocks a portion of the radiator, by adding a shroud you will be able to use the full area of the radiator.
post #5 of 13
Have a look at the Noiseblocker PL2 http://www.performance-pcs.com/catalog/index.php?main_page=product_info&products_id=27346 At full speed they're a bit louder than AP14s but have a smooth sound to them and no resonance/whining. I only have a couple of them but plan on replacing my newer AP14s with them in the near future. I don't think they push as much air as the AP14s but it's close.

I have a lot of AP14s that I bought a couple of years ago and none of them have any noticeable whining noise and are very quiet at full speed. Every one of the AP14s I've bought in the last year have whined. Shrouds unfortunately don't remove the whine.
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post #6 of 13
those fans at 700 RPM are supposed to be some of the quietest fans you can get... personally i use scythe sff21g fans at 60%/100% voltage depending on what i am doing, and i think at 60% they are effing quiet.

if you want quieter, you can always add a a shroud (which reduces fan noise by a large margin) but those are already barely pushing air, and barely making any noise. if you are using push-pull config, maybe you could try turning off the fans that are attached to the case when you want quiet. i doubt you will find fans that will actually push air that are quieter.

your other option would be to remotely mount your radiator (like in another room, or a closet and add a heat exhaust in the closet) or switch to a different kind of cooling, like a water chiller.

although, i agree that motor noise is unacceptable. i went through a ton of fans before i found the scythe ones, which have no motor noise, only the sound of air moving through the radiator.
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post #7 of 13
Thread Starter 
If I take my AP-14 and hold it in my hand its really quiet till about 900-1000 RPM then I start hearing a slight whine and by full speed at 1300-1400RPMish it gets quiet again and just has the sound of air moving. Overall outside the case it is much quieter. I wonder if most of the noise made is because the fans are mounted too close to the fins of the radiator and the shroud will help.

For more than one fan like if I hold two of them in my hand they seem to turn different speeds because they make a resonating sound together at various RPMs. With all of them in the case set to 700RPM some are 710, 690 etc and makes me go insane.

Off topic to my thread, once I silence the fans some more I can see now that the pump needs a way to be quieter. I have the aquastream xt pump which is way quieter than my friend 655 vario even on its lower settings, but still is audible to me in this Lian Li case. It used to sit on the gel stuff from petras zip tied to it so there was no screws. Now I have it zip tied hanging from the 5.25" bays with gel inbetween he zip ties and case so it's not a vibration issue, just motor noise left over.
Do they make anything to silence pumps like a cover or something?

Already pulled my hard disks out and put them in my server and mounted them via iSCSI from another room so the only stuff left that even moves to make noise is the pump and fans. PSU usually operates fanless until I fire up a game at which point I don't mind the fan noise as I have the game turned up.
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post #8 of 13
I've used sound dampening material in Lian Li cases before and it seemed to help. I think I just got a cheapo kit from sidewindercomputers.com. I know Akasa makes some expensive dampening stuff, not sure how good it is.
post #9 of 13
Thread Starter 
Also, if it helps here is a picture from back when I built the system. I have now suspended the pump and switched to black tubing due to discoloring. Everything else is pretty much the same though.

23.JPG

I have sound proofing on both side panels, the bottom and the top of the case. I don't think putting it on every ounce of metal left would make a noticeable difference so I didn't buy anymore.

Original pump mount. (I have suspended it since this image)
11.jpg
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post #10 of 13
Thread Starter 
Ok, I used my phone to record a video of my fans starting around 700 RPM close up then turning up the dials a bit up until max. There is a few spots where you can hear the fans making all kinds of weird noises when the sounds between the fans clash. Also I think the motors are quite audible for being regarded as a quiet fan that most people on this forum call silent.

[ame]http://www.youtube.com/watch?v=rhReUyEUAjg[/ame]

Excuse the overly bright flash, was taken with my new 4S lol. Might need to turn it up as the mic on the phone ain't the best.
Edited by Strobe - 10/20/11 at 10:41pm
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