PowerEdge Hardware General

Last reply by 08-20-2008 Unsolved
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Dell PowerEdge 2650 noise - again ;o)

Yes, I've read now several FAQs, threads and advices about how to keep the noise level of a PE2650 low. But I didn't become really smarter. I did all the updates but still the server is simply too loud. My fans run at: 4740, 4740, 7140, 7200, 7320, 7380, 7320 RPM.

Is there really no chance to lower that RPM??? For me this doesn't seem as a smart tempurature regulation if the fans are always "near" full power.

 

My plan is now to replace the fans (no fear - I have no warrenty anymore ;)) with low-RPM fans but I saw in the sensors stats that the minimum limits are also very high. Is there somehow an option to reduce those limits? There are now fans with about 2200RPM (with 16db!) that get 30m³/h out of the case - and 7 of them I think would be enough to keep temperature at a normal level. Are there any people out there who have experience in changing fans in a PE2650? Does anybody have tipps? Is there some vendor where I can buy those fan-poweradapters? Every help appreciated - thank you in advance.

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 While waiting for delivery of my new fans, I've manage to track down the specs for the currently installed HP fans:
 
 
Part Number................................. AFB0612EH-F00 
Manufacturer................................ Delta Electronics, Inc., China
Size, Inches................................ 2.35" X 2.35" X 1.0" 
Size, mm.................................... 60mm x 60mm x 25mm 
Voltage...................................... 12 volts DC
Current........................................ 0.48A
Watts.......................................... 5.76 
RPM .......................................... 6800 
Flow CFM (Max)............................ 38.1
Noise (dBA)................................. 46.5 
Bearing Type............................... Dual Ball Bearing 
Material-Venturi........................... UL94V-0 Plastic 
Material-Propeller......................... UL94V-0 Plastic
Power Leads................................. 3- 10"-22AWG BARE leads w/ tachometer
Termination ................................ NONE- BARE wire leads. Select optional termination
Life Expectancy-MTBF...................... 50,000 Hours 
 
 
 
 
 For comparison, this is the specs on the fans I have on order:
 
  • Application  PC Case fan
  • Fan dimension  60 x 60 x 25mm  
  • Fan speed  1500-4500 R.P.M.  
  • Fan airflow  7.5-22.49 CFM  
  • Fan air pressure  0.50-4.54mm H20  
  • Fan life expectancy  50000/hrs  
  • Bearing type  Two Ball bearing  
  • Connector  3-pin with RPM sensor  
  • Voltage rating  12V  
  • Noise level  19-30 dB(A)  
  • Product code  AK-192BKT-B 
 

I'm not so sure the sound is going to be that much quieter (or if they will work).  I guess I will find in a couple of days.

 

Chris 

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Finally today I changed the PSU fans. Now the server runs with less noise than my other servers :). The only thing you have to do is to change the pin layout of the fan-plug otherwise the fan will not turn and the server will instantly shutdown after a few seconds. See here: http://www.tilt-lan.com/clemens/PSU-FAN.jpg the right layout is on the right fan in the picture. The left fan shows the normal layout.

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Hi DeafInBothEars,

 

I'm just wondering how you've got on with the variable speed fans you've bought. I'm in a similar situation to you, and would like to get my PE2650 to be much quieter. My research has not found much in the way of suitable fans and the BIOS route hasn't turned anything up, so I'm interested in the fans you've got. Any feedback would be greatly appreciated.

 

Regards,

aiw_2000

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 I have one of those noisy 2650s as well. Its running Windows Home Server and I really do like the 2650... just not the noise.. I tried different fans as well but the computer doesn't like them... fan led's turn amber to warn they are too slow and so on and I don't want to run the puter that way, I still want an actual fan failuure to be able to read out on the display and or turn the front cover Dell badge amber. What I am considering doing is to build a small circuit that will in effect make the slower fan's speed look like its going faster... a sort of frequency multiplier if you will. This could be adapted to each fan and the result would be an extremely quiet server. The slower speed fans draw such little current that there is plenty from the same "tap" at each fan to drive a small circuit. I will research this over the next few weeks as time permits and get back to you. If I get something that works then I'll put up instructions for you guys on the Home Server and post the link here. Weather is getting nice here in Utah and I allow less "computer time" when it does.

 

 BTW: If you want a quiet full size server get a 2450. They are VERY quiet servers... ya just have to be able to live with a maximum speeg of 1ghz on the CPU's. I have a 2450 that even has the rare 5th drive bay and a DVD drive. I can imagine a room full of 2450's whirring away but a room of 2650s..... That is a deafening thought!

 

BTW: You don't have to cut the connectors off the old fans at all. Just get yourself a bunch of female really tiny Molex pins and solder them to the new fan's wiring. Then heat shrink them. The tiny Molex pins slide right over the male pins for the fans on the motherboard and stay secure.

Message Edited by Mark Allen on 05-20-2008 08:52 AM
Message Edited by Mark Allen on 05-20-2008 08:56 AM
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I finally finished my summary. You may have a look at it here: http://www.steinkogler.org/hardware/silent-dell-power-edge-2650

 

You'll also find a movie-howto for the PSU-fan-change and links to a vendor where you can buy the Molex-adapters, etc.

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Hey guys,

 

I just bought a 2650 second hand and - being newbie - was shocked by the noise. We have to use the maschine in the office and cannot put it somewhere else, so I am very desperate to find a good solution to reduce noise as much as possible. 

 

I followed this thread and am very happy that there seems to be a good solution around. BBQigniter did superb pioneer work, but this seems a bit too much "change" in the system.

 

Did anybody try the Akasa AK-192BKT fans??To me, they sound great, but none posted any success message here... Could anybody post his/her experience? I would really really appreciate that ;)

 

Thanks!

 

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I've been meaning to post back to this thread for some time.

 

Yes, in the end I did fit the Akasa AK-192BKT fans.  It was pretty straight forward and a cheap option.  The results have been pretty good.  They appear to keep the machine at a reasonable temperature all the time.

 

However the noise is still a problem, especially when the machine is working hard.  I would guess that at it's loudests, it's probably half the dB of the unmodified machine.   When it's cool and not under any load, the the noise is less again, however it's still not really quiet enough to work in the same room as it.

 

In summary I would say the Akasa AK-192BKT fans eliminate the need for earmuffs, but the noise level is still such that the machine really needs to be in another room.

 

To quiet the machine down any further then I would think BBQigniter's solution (including powersupply fans) is the only option.

 

I wish now I had of just bought a powerful desktop. 

 

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@BBQigniter. Your summary is fantastic. I'm sure it will help some people. Thank you for your efforts and sharing.
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