High frequency noise coming from PC - Suspected PSU - Page 2

macgta16 · 10-21-2009, 06:20 AM

OK i got these from the BIOS:

CPU VCORE: 3.424v
3.3 VCC: 3.424v
5v: 5.152v
12v: 12.144v
5V SB: 5.107v

About the temperatures, i'm not sure what temperatures you require since HWmonitor lists quite a lot. If you want to know if they are stable then yes they usually don't go up to 80c or anything like that.

hope that helps :)

**greenbrucelee** · 10-21-2009, 09:10 AM

you should be able to get the temps from within the BIOS, cpu temp etc

Are those voltages from the bios? if so they look ok.

**wrench97** · 10-21-2009, 12:53 PM

Recheck that CPU Vcore reading, Is that from the bios or HW monitor?

**greenbrucelee** · 10-21-2009, 01:12 PM

I never notice that, if that is your cpu vcore something is terribly wrong.

Is that from the bios?

macgta16 · 10-21-2009, 04:46 PM

Sorry about that i wrote it wrong, my CPU VCORE is: 1.296v
Also it says at the top of that post "I got these from the BIOS" :)

Anyway about the voltages n that, does that mean my PSU is in the clear?

**wrench97** · 10-21-2009, 05:02 PM

The voltages look good, however if the noise is coming from a loose heat sink or fan mounting in the PSU the voltages would not reflect that.

macgta16 · 10-21-2009, 05:19 PM

Yes but in terms of trying to find the source of the noise, would you say that the voltages mean my PSU is definately not the problem? What i mean by this is if it is going to be just a noise (as in not actually a sign of impending doom) i can put up with it if that's the case.

**wrench97** · 10-21-2009, 05:49 PM

All we can tell from the voltage readings is there is nothing currently wrong, if there is a loose component(long shot) it could be impending doom, in a shop we would swap out components until the issue is found. If you can borrow a PSU from a friend do so and test that way.

macgta16 · 10-21-2009, 06:33 PM

can a loose component cause this noise? or do you mean just in general? - also i suppose another PSU would be the next logical step, but my dad may believe this is "obsessive", and not let me borrow one. Is there anything else i can try prior?

Stu_computer · 10-21-2009, 07:38 PM

Quote:

Originally Posted by macgta16

Hello thar ;)

I have tried:

-- Attempting to find where the sound is coming from which is annoyingly impossible; i can hear it loudest when i'm at my seat (with my PC under the table to NW of me) then when i get near to the PC with the side off i can hear it clearly but again i cannot tell where its coming from, if i move my ears to certain areas of the case it just goes away then, well it's just hard to find.
-- Listening hard to the PSU, and that's incredibly quiet, except with a very silent buzz that all my PSU's make, and when the PC's off you can hear it slightly as well.

Turn PC off and unplug the AC cord then note the current time and press the Start button for 30 seconds. Leave PC unplugged for 60 minutes.

Report back with the total amount of time it took for the noise to stop, and any changes in sound (ie: pitch dropped steadily before stopped).

macgta16 · 10-22-2009, 10:05 AM

Do you mean the noise when the PC is off? or the high pitched noise? If you're on about the high pitched noise it stops straight away after the PC has fully powered down.

macgta16 · 10-22-2009, 11:23 AM

Also, i found this:
YouTube - PSU - Corsair HX620 whine / screech / whistle

I was searching for PSU sounds just to see if mine and those match up and mine sounds completely different than that (the whining starts about 1 minute in the video); I'm beginning to think that this isn't the PSU now for some reason.

**greenbrucelee** · 10-22-2009, 11:52 AM

that sounds like the fan is struggling.

macgta16 · 10-22-2009, 01:01 PM

Yes but i've been listening to a lot of youtube videos about bad PSU's and they all sound like that, whereas mine sounds completely different, and it's pulsating; im pretty sure its a fan of some sort now; btw, i looked in HWmonitor at my voltages, and for some reason it says the 12V is 9.94V which i presume is wrong?

**greenbrucelee** · 10-22-2009, 01:11 PM

look in your bios never trust a software program for this.

If you 12v was 9.94 your system wouldn't start.

As for the pulsating sound is it sort like a quiet thud thud thud or does it sounds more like a scratch.

The thud sound would make me think that a cable is hitting the side of the case or that the case side panel are warping for some reason (too much air pressure or heat).

The scratch sound would lead me to suspect the hard drive platters are failing.

macgta16 · 10-22-2009, 01:36 PM

No, it's a clean noise, but i went as close as i can towards my CPU fan (Zalman) and it seems to be coming from that; it makes this noise when the HDD's aren't plugged in anyway so.

**greenbrucelee** · 10-22-2009, 01:49 PM

Quote:

Originally Posted by macgta16

No, it's a clean noise, but i went as close as i can towards my CPU fan (Zalman) and it seems to be coming from that; it makes this noise when the HDD's aren't plugged in anyway so.

when you turn the computer off does it make a whirring sound until the fan stops spinning then disapears completly?

if so you need to oil the bearings on the fan (I think I already mentioned that earlier).

macgta16 · 10-22-2009, 02:37 PM

Yes it does whir, but the main high frequency noise seems to stop when the PC goes off and i can hear the fan whirring as it spins down. I've never oiled the bearings on a fan before, so it's probably a good idea if i just get someone who knows what they're doing to do it.

**greenbrucelee** · 10-22-2009, 02:47 PM

all you need to do is remover the fan put a drop of oil on it then leave it for a bit then put it back in, if its the cpu fan though you will have to clean off the thermal paste and reapply it.

macgta16 · 10-22-2009, 02:57 PM

Well tomorrow just to be sure, i'm going to stick a pencil into it to stop the fan (only for a few seconds) so i can see if that stops the noise; if so it's definately the fan. Is there any chance that by doing this i may electrocute myself/short the system or something like that?

10-21-2009, 06:20 AM	#21 (permalink)
macgta16 Registered User Join Date: Oct 2009 Posts: 72 OS: Windows Vista 64-bit SP1	Re: High frequency noise coming from PC - Suspected PSU OK i got these from the BIOS: CPU VCORE: 3.424v 3.3 VCC: 3.424v 5v: 5.152v 12v: 12.144v 5V SB: 5.107v About the temperatures, i'm not sure what temperatures you require since HWmonitor lists quite a lot. If you want to know if they are stable then yes they usually don't go up to 80c or anything like that. hope that helps :)

10-21-2009, 09:10 AM	#22 (permalink)
greenbrucelee Mentor Hardware team Join Date: Apr 2007 Posts: 1,814 OS: XP SP3 My System	Re: High frequency noise coming from PC - Suspected PSU you should be able to get the temps from within the BIOS, cpu temp etc Are those voltages from the bios? if so they look ok. __________________ Microsoft certified professional, Network +, A+ certified

10-21-2009, 12:53 PM	#23 (permalink)
wrench97 Moderator, Hardware Team Join Date: May 2008 Location: S.E. Pennsylvania Posts: 18,440 OS: Win7	Re: High frequency noise coming from PC - Suspected PSU Recheck that CPU Vcore reading, Is that from the bios or HW monitor? __________________ Power Supply and Selection

10-21-2009, 01:12 PM	#24 (permalink)
greenbrucelee Mentor Hardware team Join Date: Apr 2007 Posts: 1,814 OS: XP SP3 My System	Re: High frequency noise coming from PC - Suspected PSU I never notice that, if that is your cpu vcore something is terribly wrong. Is that from the bios? __________________ Microsoft certified professional, Network +, A+ certified

10-21-2009, 04:46 PM	#25 (permalink)
macgta16 Registered User Join Date: Oct 2009 Posts: 72 OS: Windows Vista 64-bit SP1	Re: High frequency noise coming from PC - Suspected PSU Sorry about that i wrote it wrong, my CPU VCORE is: 1.296v Also it says at the top of that post "I got these from the BIOS" :) Anyway about the voltages n that, does that mean my PSU is in the clear? Last edited by macgta16; 10-21-2009 at 04:47 PM.

10-21-2009, 05:02 PM	#26 (permalink)
wrench97 Moderator, Hardware Team Join Date: May 2008 Location: S.E. Pennsylvania Posts: 18,440 OS: Win7	Re: High frequency noise coming from PC - Suspected PSU The voltages look good, however if the noise is coming from a loose heat sink or fan mounting in the PSU the voltages would not reflect that. __________________ Power Supply and Selection

10-21-2009, 05:19 PM	#27 (permalink)
macgta16 Registered User Join Date: Oct 2009 Posts: 72 OS: Windows Vista 64-bit SP1	Re: High frequency noise coming from PC - Suspected PSU Yes but in terms of trying to find the source of the noise, would you say that the voltages mean my PSU is definately not the problem? What i mean by this is if it is going to be just a noise (as in not actually a sign of impending doom) i can put up with it if that's the case. Last edited by macgta16; 10-21-2009 at 05:26 PM.

10-21-2009, 05:49 PM	#28 (permalink)
wrench97 Moderator, Hardware Team Join Date: May 2008 Location: S.E. Pennsylvania Posts: 18,440 OS: Win7	Re: High frequency noise coming from PC - Suspected PSU All we can tell from the voltage readings is there is nothing currently wrong, if there is a loose component(long shot) it could be impending doom, in a shop we would swap out components until the issue is found. If you can borrow a PSU from a friend do so and test that way. __________________ Power Supply and Selection

10-21-2009, 06:33 PM	#29 (permalink)
macgta16 Registered User Join Date: Oct 2009 Posts: 72 OS: Windows Vista 64-bit SP1	Re: High frequency noise coming from PC - Suspected PSU can a loose component cause this noise? or do you mean just in general? - also i suppose another PSU would be the next logical step, but my dad may believe this is "obsessive", and not let me borrow one. Is there anything else i can try prior?

10-22-2009, 10:05 AM	#31 (permalink)
macgta16 Registered User Join Date: Oct 2009 Posts: 72 OS: Windows Vista 64-bit SP1	Re: High frequency noise coming from PC - Suspected PSU Do you mean the noise when the PC is off? or the high pitched noise? If you're on about the high pitched noise it stops straight away after the PC has fully powered down.

10-22-2009, 11:23 AM	#32 (permalink)
macgta16 Registered User Join Date: Oct 2009 Posts: 72 OS: Windows Vista 64-bit SP1	Re: High frequency noise coming from PC - Suspected PSU Also, i found this: YouTube - PSU - Corsair HX620 whine / screech / whistle I was searching for PSU sounds just to see if mine and those match up and mine sounds completely different than that (the whining starts about 1 minute in the video); I'm beginning to think that this isn't the PSU now for some reason.

10-22-2009, 11:52 AM	#33 (permalink)
greenbrucelee Mentor Hardware team Join Date: Apr 2007 Posts: 1,814 OS: XP SP3 My System	Re: High frequency noise coming from PC - Suspected PSU that sounds like the fan is struggling. __________________ Microsoft certified professional, Network +, A+ certified

10-22-2009, 01:01 PM	#34 (permalink)
macgta16 Registered User Join Date: Oct 2009 Posts: 72 OS: Windows Vista 64-bit SP1	Re: High frequency noise coming from PC - Suspected PSU Yes but i've been listening to a lot of youtube videos about bad PSU's and they all sound like that, whereas mine sounds completely different, and it's pulsating; im pretty sure its a fan of some sort now; btw, i looked in HWmonitor at my voltages, and for some reason it says the 12V is 9.94V which i presume is wrong? Last edited by macgta16; 10-22-2009 at 01:04 PM.

10-22-2009, 01:11 PM	#35 (permalink)
greenbrucelee Mentor Hardware team Join Date: Apr 2007 Posts: 1,814 OS: XP SP3 My System	Re: High frequency noise coming from PC - Suspected PSU look in your bios never trust a software program for this. If you 12v was 9.94 your system wouldn't start. As for the pulsating sound is it sort like a quiet thud thud thud or does it sounds more like a scratch. The thud sound would make me think that a cable is hitting the side of the case or that the case side panel are warping for some reason (too much air pressure or heat). The scratch sound would lead me to suspect the hard drive platters are failing. __________________ Microsoft certified professional, Network +, A+ certified

10-22-2009, 01:36 PM	#36 (permalink)
macgta16 Registered User Join Date: Oct 2009 Posts: 72 OS: Windows Vista 64-bit SP1	Re: High frequency noise coming from PC - Suspected PSU No, it's a clean noise, but i went as close as i can towards my CPU fan (Zalman) and it seems to be coming from that; it makes this noise when the HDD's aren't plugged in anyway so.

10-22-2009, 02:37 PM	#38 (permalink)
macgta16 Registered User Join Date: Oct 2009 Posts: 72 OS: Windows Vista 64-bit SP1	Re: High frequency noise coming from PC - Suspected PSU Yes it does whir, but the main high frequency noise seems to stop when the PC goes off and i can hear the fan whirring as it spins down. I've never oiled the bearings on a fan before, so it's probably a good idea if i just get someone who knows what they're doing to do it. Last edited by macgta16; 10-22-2009 at 02:38 PM.

10-22-2009, 02:47 PM	#39 (permalink)
greenbrucelee Mentor Hardware team Join Date: Apr 2007 Posts: 1,814 OS: XP SP3 My System	Re: High frequency noise coming from PC - Suspected PSU all you need to do is remover the fan put a drop of oil on it then leave it for a bit then put it back in, if its the cpu fan though you will have to clean off the thermal paste and reapply it. __________________ Microsoft certified professional, Network +, A+ certified

10-22-2009, 02:57 PM	#40 (permalink)
macgta16 Registered User Join Date: Oct 2009 Posts: 72 OS: Windows Vista 64-bit SP1	Re: High frequency noise coming from PC - Suspected PSU Well tomorrow just to be sure, i'm going to stick a pencil into it to stop the fan (only for a few seconds) so i can see if that stops the noise; if so it's definately the fan. Is there any chance that by doing this i may electrocute myself/short the system or something like that?