4GB 1Rx4 PC3U-10600R DDR3-1333 ECC Registered 1.25V Server Memory for ProLiant BL465c Gen8 DL385p Gen8 SL4545 G7

This genuine OEM 4GB DDR3 server memory features ECC error correction, registered buffering and a single-rank x4 configuration. Rated at DDR3-1333 with CL9 latency, this module is the PC3U-10600R ultra-low-voltage 1.25V version.

Assembly number 647646-171 and module model M393B5270DH0-BH9Q8 correspond to option part number 647869-B21 and replacement spare number 687457-001.

Technical Specifications

• Product Type: Server memory / RAM
• Capacity: 4GB
• Module Quantity: 1 x 4GB
• Memory Technology: DDR3 SDRAM / DDR3U
• Memory Classification: PC3U-10600R
• Rated Speed: DDR3-1333 / 1333 MT/s
• Voltage Specification: 1.25V ultra-low-voltage
• Error Correction: ECC
• Buffering: Registered DIMM / RDIMM
• Rank Configuration: Single rank — 1Rx4
• DRAM Organization: x4
• CAS Latency: CL9
• Form Factor: 240-pin DIMM
• Assembly Part Number: 647646-171
• Module Model Number: M393B5270DH0-BH9Q8
• Option Part Number: 647869-B21
• Replacement Spare Number: 687457-001
• Application: Compatible servers supporting this PC3U-10600R ultra-low-voltage memory option

Interchangeable / Replacement Part Numbers

647646-171, 647869-B21, 687457-001, M393B5270DH0-BH9Q8

• 647646-171: OEM memory assembly number
• 647869-B21: OEM 4GB single-rank x4 PC3U-10600R ultra-low-voltage memory option
• 687457-001: OEM replacement spare number
• M393B5270DH0-BH9Q8: Exact module model number

Normalized searchable forms: 647646171, 647869B21, 687457001, M393B5270DH0BH9Q8

These numbers identify the associated memory assembly, option, spare and module. This listing includes one 4GB DIMM.

⚠️ Important PC3U Memory Compatibility Notice

This listing is specifically for PC3U-10600R 1.25V ultra-low-voltage registered ECC memory. Match the complete specification before selecting a replacement.

• PC3U: Ultra-low-voltage memory classification

• 10600: DDR3-1333 bandwidth classification

• R: Registered memory

• 1Rx4: Single-rank construction using x4 DRAM devices

PC3L-10600R and PC3-10600R are different voltage classifications and should not be advertised as exact PC3U replacements without verifying the target configuration.

The “U” in PC3U identifies the voltage class. It does not mean this is an unbuffered DIMM. The final “R” identifies this module as registered memory.

✅ Confirmed Compatibility

✔️ ProLiant BL Series: BL465c Gen8 server blade configurations supporting the 647869-B21 ultra-low-voltage memory option.
✔️ ProLiant DL Series: DL385p Gen8 rack server configurations supporting the 647869-B21 ultra-low-voltage memory option.
✔️ ProLiant SL Series: SL4545 G7 server node configurations supporting the 647869-B21 ultra-low-voltage memory option.

Compatibility depends on the installed processors, existing memory and required DIMM population sequence. A server supporting another DDR3 memory type is not automatically confirmed for this specific PC3U module.

☑️ Key Features

☑️ Genuine OEM server memory
☑️ 4GB capacity supplied as one DIMM
☑️ PC3U-10600R ultra-low-voltage specification
☑️ 1.25V voltage class for supported configurations
☑️ DDR3-1333 rated data rate
☑️ ECC error correction
☑️ Registered buffering
☑️ Single-rank 1Rx4 organization
☑️ CL9 latency
☑️ Standard 240-pin DIMM form factor
☑️ Cross-referenced assembly, option, spare and module numbers
☑️ Supports the compatible server configurations listed above

⚙️ Fit Notes

• Confirm 4GB, 1Rx4, PC3U-10600R, ECC registered and 1.25V when matching the original memory.
• Match the complete module number M393B5270DH0-BH9Q8, including its suffix, when an exact model replacement is required.
• Do not select a substitute solely because its capacity and speed match.
• Follow the server’s specific rules for ultra-low-voltage memory. Do not assume standard RDIMMs and ULVDIMMs can be mixed.
• Do not mix this module with unbuffered DIMMs or load-reduced DIMMs.
• Follow the correct DIMM installation sequence and memory-channel population rules.
• Memory slots assigned to an uninstalled processor cannot be used.
• Actual operating speed and voltage depend on the supported processor and system configuration.
• This is a full-size server DIMM, not laptop SO-DIMM memory.
• Contact CPU Medics with your server model and existing memory part number if you need assistance confirming compatibility.