Strange Noise When Turning the Computer on

C

Copycats

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Feb 19, 2011
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I Just put together my new Sandy Bridge build with:

Intel i7-2600K
ASUS P8P67 Deluxe mobo
4GB Corsair DDR3-1600
Intel X-25 SSD 128GB
WD Raptor 80G
nVidia GTX570 Superclocked
Antec TruePower New 750W
Coolermaster 690II Case

When I push the power button to turn on the computer, every time, there is some strange noise from the speakers which lasts about 3 secs then goes away. After that, everything is normal and the system runs fast and quiet. Sound is normal in windows as well. Later on I found out that turning on and off the power switch on the power supply generates the same kinda noise too. First I thought it might be the PSU to blame so I switched back to my old Antec True Power 430 but the noise remains.
I also tried different grounding methods to no avail.

Any idea what's causing this? Sounds like the PSU interfering with the motherboard?
 
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Are you using onboard audio or a separate sound card? It could just be some kind of interference with the onboard sound circuitry right when the board powers up. You could try disabling the onboard sound in the BIOS and see if the problem still exists.
 
I don't know then. It could just be a problem with the motherboard. Try contacting ASUS tech support and see what they have to say.
 
I have an Athlon64X2 server that will do that on boot. It does this because the fan does not power on immediately when the PC is turned on. It spins up a few seconds later but when the CPU fan alarm is on it squeals at me.

This makes me wonder if the BIOS is capable of sending sound via the sound system. Since you didn't list discreet sound I'm assuming you're using onboard sound, no? I suppose this is possible. Check your fans to see if they all engage at power on.
 
Yes Wolf, I'm using onboard. It does seem that one of the fans may lag in powering on ... I have so many fans in the case ... which fan does this to you and how did you fix it? Thanks!
 
But strangely, without the fans on or the computer on ... turning the PSU on and off gives the same kinda noise as well ... (the PSU fan won't be on until you turn on the computer ... so )
 
Zero, although it's kinda annoying it doesn't really affect anything ... the comp runs rather very nicely. Considering the trouble of swapping the mobo ... I don't think it's worth it unless the noise issue is damaging the system in a long run ... but i doubt it will.
 
Well, you can still see if they have any comments, and if they give you the option to send it in for repairs, you can choose not to take it.
 
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