Powermac G5 high pitched noise?

NSiebenmor

macrumors member
Original poster
Jul 23, 2004
44
0
Savannah GA
I just bought a Powermac Dual 2.0 G5. I need to know if the noise I'm hearing is normal. There is a really high pitched constant noise that is relatively quiet except it is so highed pitched it stands out and is irritating. I'm not talking about the fan noise. Does anyone know what I'm talking about?
thanks

Nick
 

MacTruck

macrumors 65816
Jan 27, 2005
1,242
0
One Endless Loop
Install developer tools, then download the latest CHUD tools. When done go into system preferences there will be a new icon of a cpu, click it. When in that menu disable by unchecking "nap". See if it stops. I disabled nap when I got my G5 and it stopped all kinds of problems. My machine is perfect now.
 

zakatov

macrumors 6502a
Mar 8, 2005
501
0
South Florida
FYI: Disabling nap disables the CPUs' ability to idle, which means the temperatures will rise to levels of 100% CPU load. This will prompt the cooling subsystem (aka the fans) to also kick up a notch to compensate for the heat.

If this does not bother you (I'm not implying that it should, PowerMacs are biult with high levels of tolerance), then a better alternative is to run Folding@Home, which uses idle only CPU cycles (no performace hit) to "fold" proteins for Stanford University distributed computing project. The effect of this is that the CPUs will be working @ 100% (like when nap is disabled), so there will be no noise, and as a bonus you will be helping science.
 

MacTruck

macrumors 65816
Jan 27, 2005
1,242
0
One Endless Loop
On my Dual 2.5ghz G5 disabling nap makes the fans quieter. I would try it and see if you like it with it off. Won't hurt nothing, if its louder (which I doubt) just turn it back on.
 

cfd

macrumors member
Nov 29, 2004
73
0
Is the noise coming through the internal speaker or are there other ones hooked up?
 

NSiebenmor

macrumors member
Original poster
Jul 23, 2004
44
0
Savannah GA
I feel like an idiot, the noise is actually coming from the crt monitor I'm using! I will try CHUD anyway to see if my fans get a little quieter. thanks for the help everyone.

NSiebenmor
 

dornoforpyros

macrumors 68040
Oct 19, 2004
3,070
3
Calgary, AB
ahh I know is it's next to impossible to sleep in the same room as my g5 enless I put it to sleep. Maby it's just cuz it's a small room but it picks away at my brain it feels.
 

zakatov

macrumors 6502a
Mar 8, 2005
501
0
South Florida
NSiebenmor said:
I feel like an idiot, the noise is actually coming from the crt monitor I'm using! I will try CHUD anyway to see if my fans get a little quieter. thanks for the help everyone.

NSiebenmor
read. comprehend. post.

disabling nap speeds up the fans to compensate for increased CPU temps.
 

law guy

macrumors 6502a
Jan 17, 2003
997
0
Western Massachusetts
NSiebenmor said:
I feel like an idiot, the noise is actually coming from the crt monitor I'm using! I will try CHUD anyway to see if my fans get a little quieter. thanks for the help everyone.

NSiebenmor
I suspected - I've had that problem - lower your refresh rate - for some reason, on some monitors (mine's a Sony CRT 19" FD Trinitron) if the refresh is too high, it emits that really high pitched tone. I lowered mine down to 85, I think. I once had the same problem with a ViewSonic CRT as well - same problem and same fix (lowered the refresh rate down a notch).
 

mackaveli

macrumors regular
May 1, 2005
156
0
what program is that that shows the temperatures and so forth?

and my dual 2.3ghz is quiet unless im doing heavy work. its amazing
 

zakatov

macrumors 6502a
Mar 8, 2005
501
0
South Florida
mackaveli said:
what program is that that shows the temperatures and so forth?

and my dual 2.3ghz is quiet unless im doing heavy work. its amazing
The program that i'm using is called Hardware Monitor. It's not free, it is about $9 US dollars (they sell from europe).
The official site is here www.bresink.de/osx/HardwareMonitor.html It's a very good program with graphing and history capabilities. Well worth the price.

Also, I'm not saying that PowerMac becomes too loud when Nap is off (or when @ 100% CPU, which is basically the same to the CPUs); all I'm pointing out that temperatures and fan speeds do increase when nap is off; and instead of disabling Nap, one can just run F@H in the background and kill the chirping and beeping (those are official terms), while helping Stanford university.