IBM 74Y9189 Processor Voltage Regulator Module (VRM).

Here are the technical specifications and detailed details for the IBM 74Y9189 Processor Voltage Regulator Module (VRM).

Core Overview

Manufacturer: IBM
Product Type: Processor Voltage Regulator Module (VRM)
Design Classification: Low-Wattage / Low-Voltage Power Profile (150W Design Envelope)
CCIN (Customer Card Identification Number): 51CE

Part Number Cross-Reference (FRU / Substitutes)

The 74Y9189 part number represents one of the highly deployed base variants for this module family. It is completely interchangeable with the following alternate and newer generation FRUs:

Primary Part Number (MPN): 74Y9189
Substitute/Compatible Part Numbers: * 00E7162
- 00FX412
- 00FX413
- 01AF543
- 01AF882
Manufacturer Component ID: VRB003-030G

Hardware Compatibility

This VRM is tailored for mainstream infrastructure deployments of IBM Power Systems (POWER7 / POWER7+) entry to mid-range servers. It populates the dedicated VRM slots on the system backplane to feed the primary or secondary CPU sockets:

IBM Power 720 Express: * Machine Type-Model (MTM): 8202-E4C
- Machine Type-Model (MTM): 8202-E4D
IBM Power 740 Express:
- Machine Type-Model (MTM): 8205-E6C
- Machine Type-Model (MTM): 8205-E6D

(Note: Typically paired with standard or lower-frequency 4-core, 6-core, or specific 8-core configurations that match the 51CE power curve).

Physical Specifications

Form Factor: Proprietary Plug-in Server VRM Card with integrated retention pull tab
Dimensions: Approx. 15.0 cm x 13.0 cm x 4.0 cm
Weight: ~0.25 kg to 0.45 kg (including structural aluminum heatsink assembly)