My computer is whiney

preiter · 12th October 2006, 07:51 AM

I just rebuilt my computer, new motherboard, CPU and video card.

Now it's making a really annoying high pitched whine. It sounds a lot like the whine that CRT monitors and televisions make that most people can't seem to hear, but drives me batty. I think in CRTs it's the flyback transformer that does it.

I think it's the power supply. It's an Antec Truepower 2.0 450W. The thing is, I was using this power supply before and it never made this noise. But the new video card draws a whole lot more power than the old one. Nvidia recommends a minimum 450W power supply for this card.

So could running the power supply closer to its limit cause it to emit a high pitched noise? Is it time to buy a new power supply? It seems to be around 8 KHz, anyone know what a typical switching frequency for a SMPS is?

Nordic · 12th October 2006, 08:19 AM

Leave it runnnig and you'll probably notice your 3V and 5V lines are nowhere close to their optimal voltages...

I just have a little 7800gt, and its killing my 400W PSU, I'm afraid these days 600W to 1kW is the PSU order of the day...

m0rb0 · 12th October 2006, 12:04 PM

hiya
listenen carefully to the fan on your new heatsink!
that sounds like the only new fan you put into it?
new hdd?

12th October 2006, 07:51 AM	#1
preiter diyAudio Member Join Date: May 2006	My computer is whiney I just rebuilt my computer, new motherboard, CPU and video card. Now it's making a really annoying high pitched whine. It sounds a lot like the whine that CRT monitors and televisions make that most people can't seem to hear, but drives me batty. I think in CRTs it's the flyback transformer that does it. I think it's the power supply. It's an Antec Truepower 2.0 450W. The thing is, I was using this power supply before and it never made this noise. But the new video card draws a whole lot more power than the old one. Nvidia recommends a minimum 450W power supply for this card. So could running the power supply closer to its limit cause it to emit a high pitched noise? Is it time to buy a new power supply? It seems to be around 8 KHz, anyone know what a typical switching frequency for a SMPS is?

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12th October 2006, 08:19 AM	#2
Nordic diyAudio Member Join Date: Sep 2005	Leave it runnnig and you'll probably notice your 3V and 5V lines are nowhere close to their optimal voltages... I just have a little 7800gt, and its killing my 400W PSU, I'm afraid these days 600W to 1kW is the PSU order of the day...

12th October 2006, 12:04 PM	#3
m0rb0 diyAudio Member Join Date: Sep 2006	hiya listenen carefully to the fan on your new heatsink! that sounds like the only new fan you put into it? new hdd?

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