Voltage Regulator Modules
Voltage Regulator Modules covers plug-in VRMs that step power down to processor and memory voltages in older servers. Coverage includes processor and memory VRMs for IBM Power 520, 570 and 770 systems, IBM xSeries 366 and iSeries modules, HP 48V DC-to-DC VRMs for rp7410, rp8400 and Integrity rx8640 servers, Dell PowerEdge 2600, 4600 and 6950 VRMs, Fujitsu PrimePower and SGI modules, and a power backplane VRM for StorageWorks D2600 and D2700 shelves.
- 311 parts
- Free U.S. ground shipping on in-stock parts
Voltage Regulator Modules: 311 products
Buying guide
Replacing a VRM
One per processor
In many older servers each processor socket has its own VRM slot, which stays empty until a processor is installed.
Adding a processor
Upgrading from one processor to two usually means ordering the matching VRM along with the second processor.
Failure signs
A failed VRM typically shows up as a processor or power fault on the diagnostic LEDs or in the system log, and the processor it feeds is disabled.
Voltage Regulator Modules
Frequently asked questions
Are VRMs interchangeable between servers?
No. Output voltage, current rating and connector differ by platform and sometimes by processor, so order by server model or the VRM's own part number.
What is a 48V DC-to-DC VRM?
In HP rp-series and Integrity cell-based servers, power is distributed inside the cabinet at 48V DC, and DC-to-DC VRMs convert it to the low voltages processors and memory need.
Do you carry VRMs for IBM Power servers?
Yes. Processor and memory VRMs for Power 520, 570 and 770 systems are listed, along with modules for IntelliStation POWER workstations and RS/6000 and pSeries servers.
