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| Thread ID: 62127 | 2005-09-27 09:45:00 | Zalman CPNS7700-ALCU CPU Cooler | Phil B (648) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 391379 | 2005-09-27 09:45:00 | Has anyone else got one of these? The reason I ask is, although it's a lot quieter than the stock fan, it still makes a moaning noise when set on the lowest speed. With all the ads & reviews I read, I was expecting almost silence. There's no noise from the fan as far as air movement goes. The fan motor seems to have a strong magnetic field, ie if I spin it with my fingers it doesn't stop smoothly, this I suspect would be the reason for the noise. Feedback would be appreciated, I don't want to look like a complete plonker at the computer shop. Phil |
Phil B (648) | ||
| 391380 | 2005-09-27 10:59:00 | "Does not generate noise or vibration in Silent Mode" This was accoeding to the specs. So go ahead and whinge in the shop.... |
pctek (84) | ||
| 391381 | 2005-09-27 11:20:00 | i suspect the small vibration the van is makeing is amplified by the case. cheak if the motherboard backing plate is vibrating. otherwise it could be an out of balance fan. |
tweak'e (69) | ||
| 391382 | 2005-09-28 08:40:00 | Back to the shop then. I know there's nothing wrong with the mounting, I had to do some cutting of the case internals to get it in, nothing structural. Turn the speed up & the tone goes up with it, no panel vibration. I know what I'll be doing on Saturday now Phil |
Phil B (648) | ||
| 391383 | 2005-09-28 11:29:00 | Hell, you should be vertually silent with a 120mm fan sitting on your CPU. Whats the lowest speed setting, around 1200-1600 it should make no discernable sound, if it's running at 2000-2200 you'll hear it. Zalman make some good products (I have a couple of cnps copper flower coolers), but I think of late they've been run over by a couple of the other crowds. |
Murray P (44) | ||
| 391384 | 2005-09-29 10:32:00 | Hi Murray The fans air movement isn't noisy, it's the motor. I emailed the shop & have got no reply, if I don't get one tomorrow i'll be making my feelings felt & heard on Saturday. Lets just hope their customer service is as flash as their shop. Hopefully I just bought a lemon & it'll be sorted out. The fans lowest speed is 1300. |
Phil B (648) | ||
| 391385 | 2005-09-30 05:16:00 | It is normal for a brushless "DC" motor to feel odd (not "smooth") when turned by hand. It's called "cogging", and is caused by the fact that it's really a three phase motor with PM field. The rotor poles are strongly attracted to the field pole pieces. It is more pronounced on stepping motors. | Graham L (2) | ||
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