Question about IBM Netfinity 3500 M20 8657 Server

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The vrm for my 3500m20

Thanxfor the reply guys! so now i am looking for the vrm at internet are there ibm vrm's wich are compatable with the 3500 m20 vrm? i see a lot of ibm vrm's at ebay but none are for the 3500 m20 partically.. for instance : is the vrm for the 5000 5100 series usable for my 3500 m20? or are there other suggestions for the 3500 m20 thanx alot!!

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Re: the vrm for my 3500m20

I am using a compaq vrm for my 3500 m20:
the number is:

this one works!!

Posted on Mar 10, 2008

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We need To Install Another Processor But The 2nd Slot Doesn't Work To new one That Work In the other slot

Welcome to Fixya
By the way have you purchased the VRM module . If you are about to upgrade the server with second processor you should have VRM also . Without VRM , the second process wouldn't work and it will light out amber LED(Orange) . Now If you have VRM then just swap the processor and check. That is check whether the second processor works while insert it in first processor slot. If it works then it relates to motherboard issue .


Jan 27, 2011 | IBM x3400 Server

1 Answer

Startup problem

Assuming all appears normal (LED's etc) I would suggest you could have a Processor or VRM issue. Drop the machine to a single processor /VRM and see if that helps. Another possibility is a system board issue

May 27, 2009 | HP ProLiant ML370 G4 Server

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No display on DL380 g4

This can be caused by a processor / VRM issue or even a system board fail. Try dropping to a single proc and VRM and swap test with the others.

May 01, 2009 | HP Compaq ProLiant DL380 G4 Server

3 Answers

Its not booting and the Leds VRM and NMI are with amber color

VRM and NMI lights lit usually indicate an issue with CPU #2's VRM which can be replaced. Also check 5 lights on back middle of system. If VRM light is lit here remove CPU 2 and VRM and reboot system. If system boots, this was the issue...

Apr 25, 2009 | IBM eServer xSeries 346 8840 (884022U)

1 Answer

1600sc second CPU


Yes, some systems (newer PowerEdge Servers, generally 6/7th Generation and above) have onboard VRMs.

1600sc is a 6th gen PowerEdge (with Simple Computing). I can checked and be absolute certain from within Dell. I'm on VAC until Saturday.

In the meantime, check the PRC model and revision and ensure that they match. Given that a single PRC POST/Boots, try upgrading (if not already) the system BIOS to latest revision.

If the PRC model/revision does match and you have the latest BIOS version, also if the VRMs are not needed, then from the Troubleshooting you have already done, we may conclude that the PRC 2 slot is faulty.

I will confirm the VRM query on Saturday.

PowerEdge 1600SC, BIOS A12 Update Package for Microsoft Windows -
PowerEdge 1600SC, BIOS A12 Floppy Update Package -


May 14, 2008 | Dell PowerEdge 1600SC Server

1 Answer

Adding second CPU


Did you receive a VRM with the the PRC upgrade kit? And have you installed it?

The following items are/should be included in a microprocessor upgrade kit:
• A microprocessor (PRC)
• A heat sink
• Heat-sink retention clip(s)
• A voltage regulator module (VRM),
Your upgrade kit may also include a cooling fan.

If you are adding a secondary microprocessor, examine the VRM to ensure that it is the correct VRM for your system. Install the VRM in the appropriate secondary VRM connector, ensuring that the latches at each end of the connector engage. If you received two VRMs with the upgrade kit, replace the primary VRM already installed in the system with one of the VRMs from the upgrade kit.
Note: The system does not support mismatched VRMs.

Check PE1600sc Microprocessor Upgrade Installation Guide -

Let me know how you get on


May 13, 2008 | Dell PowerEdge 1600SC Server

2 Answers

Keeps on rebooting

The processor fan should have failed. check it out.

Feb 17, 2008 | IBM Netfinity 3500 M20 8657 Server

1 Answer

Server guide for the 3500m20


Have you tried

It may have what you're looking for.

Nov 20, 2007 | IBM Netfinity 3500 M20 8657 Server

1 Answer

Running Non-ECC Ram in a IBM Netfinity 3500 M20

Dear NickB,

In my experience working with many servers, Non-ECC memory will not work on a machine that requires ECC memory. It is possible in some servers to disable the ECC mode in the system BIOS to allow non-ECC memory to work, but you will often end up with performence problems later on.
Hope this information helps, let me know if I can be of any further assistance.

Oct 31, 2007 | IBM Netfinity 3500 M20 8657 Server

1 Answer

Video controller disabling

That model server comes with onboard video. If you wish to use a PCI video card then all you have to do is place it in the server and the BIOS will automatically disable the onboard. If it currently has a PCI video card in it, just remove the PCI card and you should get the onboard video again. Hope this helps.

Aug 28, 2007 | IBM Netfinity 3500 M20 8657 Server

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