Question about Dell Precision Workstation 670 PC Desktop

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Possible VRM 0 failure

I have gone through and the suggestions on Dell's site and diagnosed the Pre Bios turbo fan noise my Precision 670 is making as 'possible VRM 0 failure'. Do you know if this type of failure is common? Also what is the general cost of a replacement VRM module?

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  • me27 Sep 23, 2008

    After going out of town for 6 weeks, my Dell Precision 670 would shut down without warning. Sometimes it would happen on start up, sometimes a few minutes into start up, sometimes if i left it on overnight.

    Occasionally it would behave and I could work as usual. But this morning it wouldnt start up at all. The Dell LEDs (GYYoff) indicate a "A possible VRM 0 failure has occurred".

    Also, the fan now sounds really loud if i turn the computer on.

    Is there a solution to this problem? Is it a simple case of replacing the VRM?

    Thanks in advance!

  • lovelc Oct 04, 2008

    My Duel 670 will not boot as well. When powered on, the fans blow hard.

    Any suggestions?

  • Anonymous Mar 12, 2009

    Same issues just shutting down without notice. never had any issues like this will the vrm 0 failure. really weird.



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Possible VRM 0 failure - 69bf9f3.jpgHi dear
Short for voltage regulator module, a small module that installs on a motherboard to regulate the voltage fed to the microprocessor. Nearly all motherboards have either a built-in voltage regulator or a VRM, the only difference being that the VRM is replaceable.
the cost is about $80 USD



Posted on Mar 23, 2008

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I also experienced this issue and had to replace the motherboard due to bulging capacitors and the VRM as well. Both were bad. Luckily both parts are available online and were inexpensive.

Posted on Jan 02, 2010

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Alternatively, it could be a faulty motherboard.

I got the same post code lights GYYoff when my 670's motherboard died due to the capacitors exploding.  I also got the same "turbo fan" symptoms.  I first tried the VRM module, as that is what the post code indicated, but that didn't solve a thing.  I then noticed that some of the capacitors had popped and/or were bulging around the CPU sockets.  If so,  you can pick up a cheap replacement motherboard on eBay for around 100.  That's what I did after, and then my problems were gone permanently.


Posted on Oct 19, 2008

Try RTCRST jumping (by the system battery)

Posted on Apr 24, 2008

Try RTCRST jumping (by the system battery)

Posted on Apr 24, 2008

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Dell precision 670 diagnostic lights y g y

Click on -
Dell Precision Workstation 470 and 670 Computer User's Guide

In the list on the right side, click on - Tools to Help Solve Problems

In the list on the left side, click on - Diagnostic Lights

Yellow (A) Green (B) Yellow (C)

"A possible VRM 1 failure has occurred"

VRM stands for Voltage Regulator Module.

It regulates Voltage for the Processor.

The Processor MUST have a steady, 'clean', supply of Voltage; and it MUST be kept within the tight voltage range, for the Processor.

Too little, or too much; and the Processor turns off. (BIOS turns it off)

Your motherboard supports two Processors.

1) Processor (CPU_0) Zero which is in the middle of the motherboard, next to the PCI Express x16 slot;

2) and Processor (CPU_1) One, which is next to it.

The VRM 1 has failed. Needs to be replaced.

VRM's used are interchangeable.

IMHO you can remove Processor 1 (CPU_1), and it's VRM, and still use the computer; albiet slower though.

For additional questions please post in a Comment.

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Dell Support > Precision 470 Workstation Desktop PC > Users Guide,

Tools to Help Solve Problems > Diagnostic Lights,

"A possible VRM 0 has occurred"

VRM = Voltage Regulator Module

Here is what the motherboard looks like,

[Note* Posted for photo reference only. Not for advertising.
Besides, I do not see any VRM's plugged in. Means you get the motherboard only, and no VRM's. You need a VRM ]

What the Voltage Regulator Module looks like,

(Again, not for advertising. Click on the photo of the VRM to enlarge)

Notice that your motherboard has two VRM's. This is because there are two Processors.
Apparently the VRM for one of your Xeon processors is bad. (Z-on)

Since it states VRM -> 0, it is for the Processor 0, or in the number 1 processor socket.

What does a Voltage Regulator Module do for a Processor?
Regulates voltage.

A Processor MUST have a steady, 'clean' supply of voltage, AND it must be within the voltage range for the processor.

Since the motherboard uses an Intel E7525 motherboard chipset, it can support Intel Xeon processors, with up to an 800MegaHertz Front Side Bus. (800MHz FSB)

Looking at a typical Intel Xeon single-core processor, with an 800MHz FSB, let me show you it's voltage requirements,

1.287 to 1.400 (DC)

May be just a bad VRM.

However, I would also like you to look at the Electrolytic Capacitors on the motherboard. From what I have seen, those motherboards are notorious about having capacitors go bad.

Visual identification of bad Electrolytic Capacitors,

For additional questions please post in a Comment.


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How many beeps? Any pattern? (e.g., short, short, long, long, low, high) ?

Contact Dell, and purchase a replacement motherboard.

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Did you change BIOS settings or does your BIOS supports dual processors?

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Take a 2-CPU Precision 670 down to 1-CPU

You probably removed the "primary" CPU,
and the computer cannot operate only with the "secondary" CPU installed.

Move the CPU from the "secondary" slot to the "primary" slot.

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Is there a way to make sure both for my processes are working in my 670 Dell. I checked device manager it only registers one CPU. Two are installed with the extra VRM. No error messages are shown.

I would suggest going to the dell website and ensuring that all drivers are updates to their most current version. Also, flash the BIOS to the most current version if it is not showing the same version offered on the site.

Good Luck,


Jan 11, 2010 | Dell Precision Workstation 670 PC Desktop

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Noisy piece of "Dell" lol

That's a confusing description of the events charles.

Have you identified the cause of the original problem - the dead caps? Is Over Voltage a possibility - have you verified the stability of the PSU?

Apologies if I've misunderstood.

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Dell Precision 670 Workstation possible VRM 0 issue


I can figure out what happen to your PC. However since that your pc keep slow ..If you can do open your pc and try to refix all the connection. the memory, hard drive, VGA card and other and test.. if this not solve then try to restore your original by reinstalling your windows operating system.

may this help,


Jun 23, 2008 | Dell Precision Workstation 670 PC Desktop

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