Fan Testing Part 2 (Retesting + Noise)

[Martinm210]

Just got the fans!

Tried them right away. What i found was that the GT 1150 was very silent even at 12v (no rad) and the S-flex F rather noisy. And I also tried a Yate SL from petras. At 12v the SL is much more noisier compared to the GT 1150. But the GT have that high pitch hum to it. Not as much on 1150 rpm but with the 1850 martin recorded. But what i found out that was that if I took the fan from the table and held it in my hand it disappeared! And also if I put some rubber or anything that could act as a antivib material it was gone. So I think that the sound comes from mounting without antivib.

Martin did you use some kind of material to act as a anti vibb when you mount the fans? If you aren't using that the fans will get even quieter. Try holding the GT 1850 in your hand and try!

So far i have only gotten good impressions from the GT!

No, mine was a direct mount. I felt this was the only fair way to reward the fan makers that included some sort of antivibe frame. There's definately some substantial gains to be had with a good foam gasket, I prefer the custom made type from 1/8" sticky foam myself. And before anyone asks...No I'm not going to retest them all with a gasket, my wife has already been nudging me with impatience to get these test done. It just so happens that she likes to wash close in the evening when I need to run tests and the two conflict. I've been having to shut down the washer/dryer to do that, and she's quickly running out of patience with me..

Links or didn't happen


@ Martinm210
What anemometer are you using?

It doesn't have a brand name, it's one of the cheap Ebay anemometers and cost under $100. I wouldn't trust the numbers from an absolute perspective, but since they were all tested with the anemometer in a fixed location and they were all using the same duct calibration area, they should be pretty good for relative comparisons within a couple of CFM is my guess. Also only good for 10CFM+, anything below that is not trustworthy.

what about 140mm fans? 140x51mm sanace?

My test rig is only setup for 120mm fans, and I'm not testing anymore than I currently have for now. I have a couple more donated fans coming and I "May" buy some for curiosity sake, but I'm not taking request for which fans to buy. If you really want me to test a particular model, I'll consider that if you pay and send me a sample. I'll donate my time that I have, but I'm not donating my family's budget for others curiosity. Sorry.

Leave his BS on his forum thats why he has it.

Agreed, please leave discussion of banned members for PMs or emails, I appreciate it.

Here are two more fans uploaded, I got about 10 more recordings made last night.

Noise Blocker M12P
http://www.youtube.com/watch?v=BqE5VuwUS7c

Nanoxia FX12 2000
http://www.youtube.com/watch?v=3NWkB0U6UOU

more to come...