G5 vs macpro noise levels

I currently run a few powermac g5's and have been hesitant for a number of reasons to upgrade to a macpro, the main reason being noise volume.
How does the macpro hold up to the g5 in terms of volume (the fans, the drives, etc..) I've heard stories about the drives being much louder unless you manually swap them for quieter ones. My main concern is the fan volume, since I do have an xserve g5 and an xserve intel, and the intel (when its working hard) sounds almost as loud, if not louder, than the original xserve g4!

The Mac Pro is an exceptionally quiet system. Mine would be near silent if it weren't for the crappy fan that's being used on the ATi X1900 XT (which I'm strongly considering replacing with an Artic Cooling Accelero X2) especially when it's being worked hard.
Obviously you get fan noise due to heat and because of that, the environment does make a difference so be sure that the ambeint environment is'nt going to cause undue stress on the system's natural cooling.
I certainly can't compalin about the volume of my Mac Pro and neither can the majority of Mac Pro owners.

Similar Messages

ATI Radeon X1900 XT Noise levels

Hi,
I'm considering a Mac Pro + 4GB RAM + ATI X1900 XT to run Apeture, based on the experiences & recommendations in this forum.
Can anyone comment on the noise level of the ATI X1900 XT compared with, say, the standard GeForce 7300 GT? I use my current Mac to run iTunes, as well as some other sound based apps that would suffer if the graphics card noise level was like a jumbo jet on final approach.
Does anyone have experiences here they can share?
I read in the forum that there is a possibility of a ATI Radeon X1950 XTX for Mac Pro that is quieter ... any truth in that?
Much appreciated.
Mac Mini Mac OS X (10.4.7) Canon DPP running on external 0.5TB Firewire drive

Can anyone comment on the noise level of the ATI
X1900 XT compared with, say, the standard GeForce
7300 GT? I use my current Mac to run iTunes, as well
as some other sound based apps that would suffer if
the graphics card noise level was like a jumbo jet on
final approach.
I have a MacPro 2.66 with the X1900 which was preinstalled in the system. The card is quite noisy but it is at an acceptable level. The reason you hear it is that the MacPro itself is very silent. Two components are competing which can make more noise: the harddisk (standard model with 250 GB) and the X1900. :-))
The sound from the X1900 is a constant fan noise which you are able to ignore while you work with this awesome machine. The performance of Aperture is simply great with this card even if I just installed 1GB of RAM!
Let me say it this way: If you want great performance for Aperture you should arrange with the fan noise of the X1900. Im convinced that we will see much more silent cards in the future which will give us the same performance. Then the time for a nice christmas present will have come! :-))

Why does NI-9233 with IEPE microphone report 39dBA as minimum noise level?

Hi,
I have been using an ACO Pacific 1/2" IEPE microphone and preamp (7052SYS) with cDAQ and a 9233 IEPE module. The ACO mic is very similar to the G.R.A.S. 46AE (50mV/Pa) but with a 20mV/Pa sensitivity. Using this set-up in a hemi-anechoic chamber, the SPL is reported as about 39dBA (using the Sound and Vibration standard 'sound meter' VI). Yet, the third party lab's signal analyzer reports the room at about 25dBA. I have partially verified the NI set-up with a 114dB 1kHz calibrator. The NI set-up indicates about 114.3dBA. So we are on the money there.
Is there a noise floor on the 9233 that I am dealing with? Any thoughts? Recently, my company has built its own hemi-anechoic chamber and we like the NI tools. We had hoped to use the newer 9234 with a cDAQ chassis since the 51.2kS/sec is sufficient for our measurement range of 20-20kHz. We already use cDAQ extensively here.
Thanks,
-JD
Solved!
Go to Solution.

From the 9233 specs:
Integrating Noise density:
A-Weighted Power = ( A weighting power factor for bandwidth ) * (Bandwidth) * ( Noise Level )^2
A-Weighted Power = ( 0.53 ) * ( 20000 - 20 Hz ) * ( 400 nV / sqrt(Hz) / 20 mV / Pa )^2
A-Weighted Power = 4.26u Pa^2 rms
Leq (A-Weighted) = 2.06m Pa rms = 40.2 dB(A) ref 20u Pa
Calculating from Noise at full scale range:
FS = Voltage Range / Sensitivity
FS = ( 5 / sqrt(2) ) V rms / ( 20 mV / Pa ) = 176.8 Pa rms = 138.9 dB ref 20u Pa
Noise = 138.9 dB ref 20u Pa - 95 dB FS - 2.73 dB(A) = 41.2 dB(A) ref 20u Pa
So the fact that you are reading 39 dB(A) indicates that your 9233 noise is meeting specifications. There is still an issue that some effort needs to be made to better match the signal range to the input range of the 9233. You can add some external signal conditioning to apply pregain (20 dB) to the microphone output before the 9233. You also have other DSA hardware options that include input gain.
Doug
NI Sound and Vibration

How to reduce noise level on the DAQ AO?

Hello everyone,
I am using an analog output channel of a PCI-6014. The DAQ is sitting in a PC slot of a computer running Windows 2000. On the other side the DAQ is connected to an external (proprietary) conditioner box using the standard NI's shielded cable.
The problem is that the noise on the AO seems to be too high (around 2 mV peak-to-peak) depending on the computer load despite what is actually sent to that output. When the computer is really busy (booting up, linking an exectable, etc.), the noise level on the AO grows dramatically, while at the time the computer is idle, the noise level seems to be inside the spec range (around 1 LSB).
I replaced a computer power supply with a more powerful one, and moved the DAQ to the next PCI slot, but both measures gave just a minor improvement if any at all.
What can i do? Switch to a better-shielded or just different DAQ? Use a different form factor of the computer motherboard? What else?
I greatly appreciate your help.
Mike Faynberg

Mike,
The noise could possibly be coming from the 5V supply if it is really
noisy. Perhaps a more powerful (expensive) supply could help here?
As a last resort, I've heard of people wrapping DAQ cards in aluminum
foil (completely unsupported by NI). Of course, in order to prevent
shorting, you'd want to wrap it in something insulative first, like wax
paper. And while you are in the kitchen, could you whip me up a
sandwich?
Hope this helps,
Ryan Verret
Product Marketing Engineer
Signal Generators
National Instruments

S10 noise level too high when closed

HI,
I just unpacked a new S10 6423 47G. I was startled by the noise level from the start and now that after completion of the windows setup the noise level has not gone down(I has hoping for a fan control issue), I have stopped further installation and am wondering what to do next.
The three fans seem ok and fairly quiet, I think the installation of the hard drive is also nicely solved.
When the unit is open the noise level is nothing great but ok. As soon as I put the side panel on, I have an increase in noise level that brings me over the tolerance treshold.
I am not sure about the reason, the panel is quite loose but when I press on certain or all parts there is no change in sound. It seems there is resonance in the entire case when I install the side panel. It starts even when the panel is not completey vertfical. In addition to the general noise level there also seems to be resonance of other frequencies as from time to time there is a humming with a frequency of a few changes a minute.
I am really disappointed, the "quiet like whipser noise level" (or so the ad went) was the thing that made me buy this computer without thinking much either about specs or price, I just wanted a reasonably quiet computer.
Any advice?
ThanksM.

Dear Brian,
thanks a lot for your info. I am relieved to see that the noise level is acceptable with your machine. That gives me hope.
FYI, I contacted Lenovo Germany and they were polite but not too helpful, they said that naturally this computer should be louder than a normal pc and did not want to hear much about the way the system is advertised as ultra-quiet. I do not believe in advertising promises but a moderately decent noise level i do expect.
I will return this unit to the dealer and order a new one - hoping that this is only a singular experience.
For me it is not an option to be unhappy with Lenovo - I like the Think series a lot and buy their notebooks all the time for business..
M.

Noise level and lost connection

Two or three times aweek I loose connection,hub lights all indicate no problem but on checking find noise level reading on hub of several million db.Unplug hub wait a few minutes and power up again normally solves the problem level back to normal 3-4db.Last week it didn't and after an hour on the phone to BT told there was a problem on the line,got connection back next day and no problems until today when I've had same problem high noise level but has reset OK.
Since BT "solved the connection problem" when running BT speedtest says there are additional services running on my connection.I do not have BT vision,so any ideas hat this is?Could this be causing a problem?
Thank you
Solved!
Go to Solution.

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Result from speedtest .net from 12/4 with new bt hub
Time and date,download uploadping location server and distance to server

How should I set the parameters of PID Autotuning such as relay amplitude and PV noise level?

I want to control the temperature of a room by changing the hot water flow of a radiator with a control valve. The desirable control accuracy is +/- 0.5 degree of centigrade.
What number should I set for relay amplitude? And what number should I set for PV noise level?

Hello loghmani,
If your output is saturating try to reduce your relay amplitude and/or reduce the gain Kc of the PID controller before starting the autotuning procedure. You can find more information about each of the parameters that you've inquired about at this KnowledgeBase article.
I would recommend taking a look at the General Auto PID Simulator.vi example. You can find this example by doing a search in the example finder or by clicking linked example at the bottom of the detailed help page of the Autotuning PID.vi.
If you haven't looked at the PID user manual that also contains useful information on setting up PID algorithims and Autotuning.
David A
National Instruments
FlexRIO Product Support Engineer

After downloading Lion the noise level of the fans increased. A noise which did not exist with Snow Leopard. Any ideas how to reduce noise?

After downloading Lion the noise level of (what I believe to be ) the fans increased. A humming noise which did not exist with Snow Leopard. Any ideas how to reduce this noise?

I have seen this mentioned a dozen times, here, on Lion,and MacRumors.
Nope. Usual suspects.
And whether you tried a clean install instead (backup and erase) and then use MA to import

Laserjet 5100Dtn - fan noise level / additional 500 page papertray

Hi all,
We've just upgraded our 4050n laserjet to a 5100Dtn laserjet.
2 questions:
- standby noise level: our 4050 is completely silent in standby; we're really amazed at the noise level of the 5100Dtn.
It's not excessive, but very audibly present.
How is your experience with the 5000 series in standby mode?
Could it be that something's wrong and our 5100 needs to enter 'deeper' standby? (We've set standby at 30 minute interval (shortest))
- Is it possible to add a 2nd 500 page papertray?
Our supplier has provided a second one, but it lacks the electrical pass-through connections. In other words to me it is a
'bottom' tray... Do these kind of papertrays exist at all, or is this only possible with 250 page trays?
Thanks for your help!
Erwin

Great opening post Carsten!
The latest bios:
http://www-307.ibm.com/pc/support/site.wss/document.do?sitestyle=lenovo&lndocid=MIGR-71252 (BIOS 66)
The FSB can be reduced from 133MHz to 100MHz using SetFSB, this also reduces the heat:
http://www13.plala.or.jp/setfsb/
clockgen = SLG8SP513V
If you add a shortcut to the startup folder the program will start at startup. Under properties you can change the target to:
"C:\Program Files\SetFSB\setfsb.exe" -s100 -b1 -cg[SLG8SP513V] -w20
So it starts with a FSB of 100Mhz, in the background, with the right clock generator, after 20 seconds.
Message Edited by quazar on 04-25-2009 05:07 AM

SRW2008MP noise level

Is it really dangerous to disconnect the internal fan ?
The noise level is very too high for a personnal home use.

Yes! Disconnecting the fan would not only cause the unit to overheat and fail but would also void any warranty you have the product. There is a Cisco Small Business Managed Switch that is fanless and thus makes no noise, but it's only an 8-port switch. Is a 24-port switch a requirement for your home use? If not, take a look at the SFE1000P.

SG300-28P noise level... (fan control)

Hello,
May be somebody can help me. In official information for SG300-28p noise level is 40.6 dB, but in fact its too noisy. Is it possible to change speed of fans? I use only 8 PoE ports.
Thanks in advance,
Andrey

Hi Andrey,
I placed a sound meter within 6 inches of the Right hand side of my SG300-28P and found a average dB level of 47
I rested a sound meter on top of my SG300-28P and found a average dB level of 59-60dB .
I used my motorola atria phone in conjunction with a Sound Meter ver 1.4.3 dB meter app to perform the measurements.
My measurements were not done according to any standards based approach for measurements of sound level of machines.
Conversation in restaurant, office, background music, Air conditioning unit at 100 ft
60
Half as loud as 70 dB. Fairly quiet
Quiet suburb, conversation at home. Large electrical transformers at 100 ft
50
One-fourth as loud as 70 dB.
Library, bird calls (44 dB); lowest limit of urban ambient sound
40
One-eighth as loud as 70 dB.
reference :http://www.industrialnoisecontrol.com/comparative-noise-examples.htm
My unit is no more than 3 feet from my left ear, and I do not find the sound distracting..but noise/sound is subjective.
The fans on the SG300-28P are not adjustable.
regards Dave

Any simple method to detect noise level of a wave

As the attached wave, is there any simple method to detect noise level of a wave.
The sampling rate is 100M, the time duration is 20ms.
Any suggestion, thanks.
Attachments:
wave.png ‏11 KB

Take your data and make a histogram of your values to get a feeling for the distributuion. Mostly a gaussians bell shape
Calc the mean and the standard deviation. 3 times the standard dev. (say an educated guess ) should be a good starting point.
or
Apply a light (5 point) median filter (filter the spikes) and look for the min/max ....
or
Get to know more about your noise and do more math ...
Greetings from Germany
Henrik
LV since v3.1
“ground” is a convenient fantasy
'˙˙˙˙uıɐƃɐ lɐıp puɐ °06 ǝuoɥd ɹnoʎ uɹnʇ ǝsɐǝld 'ʎɹɐuıƃɐɯı sı pǝlɐıp ǝʌɐɥ noʎ ɹǝqɯnu ǝɥʇ'

Experiencing increased channel noise levels on PXIe4497 with 1071 fan on HIGH

I am using a PXIe-4497 to collect microphone data and when I switch the PXI chassis 1071e fan to HIGH setting, the noise level increases. The chassis is outside of an isolated test chamber, so the noise isn't occuring acoustically. Please see the FFT plot below of fan on AUTO (white trace) and fan on HIGH (red trace). Has anyone had this issue?
Attachments:
Background Measurement with PXI1071 fan on AUTO and HIGH.PNG ‏89 KB

There was some noise getting the pass through into the chamber. We added more sound insulation to block it out. Here's what it looks like with the added insulation (FAn on HIGH, white trace is with added insulation):
But as you can see there are ~256Hz harmonics. The data below is for MIC Y which is last channel the PXI-4492 (first module). The difference between AUTO and HIGH settings is now:
Here is MIC Z which is first channel input on the next module PXI-4497:
Auto and HIGH fan settings are close to being similar for MIC Z> Here are MICs X (white), Y(red), and Z (green) plotted together with fan on HIGH...X and Y are on PXI-4492 (last two inputs) and Z is on PXI-4497:
As you can see MIC Z doesn't have the 256Hz harmonics. We swapped the Z with the Y channels to see if it was MIC or channel related. Below is MIC Z in last input channel of PXI-4492 (where MIC Y was originally):
The noise follows the input channel, not the MIC. Here is the other side of the swap...MIC Y in first input channel of PXI-4497:
No significant change now between Auto and HIGH fan settings.
This seems to be input module related....
What now?

How to reduce background noise level using Premiere Elements

How do I reduce the background noise level using Premiere Elements?

Welcome to the forum.
PrE has a few Effects, that might help, but an Audio-editing program is much, much better. I use Adobe Audition, but the free Audacity is pretty handy.
This ARTICLE will give you more tips.
Good luck,
Hunt

Noise level measurement

Hi
The attached file is a recording of an audio input with no signal aplied. I need to know the noise level in db. I have the latest labview but do not have the sound and vibration tool kit. According to some of my coligues useing other analytical tools the level is about -30db. I am not shure how to code this in Labview. Please help.
Note:
I had to change the file type to .csv to be able to uplad it to this site but it actualy is a .wav file.
Thank you
Solved!
Go to Solution.
Attachments:
Blah.csv ‏3877 KB

Hi PercyH,
You should be able to use the Spectral Measurement express vi to do basic analysis of signal noise levels. There are also several signal analysis tools that come with the base LabVIEW package in the Signal Processing Palette.
Hope this helps!
Starla T.

G5 vs macpro noise levels

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