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Green 240-pin DDR3 UDIMM with black chips, new condition

A-Tech

A-Tech 4GB DDR3 1866 ECC UDIMM 1Rx8 Server Memory

SKU CH-YMXR-KXDF4

4GB DDR3 1866 ECC UDIMM module with CL13 latency and 1.5V operation for server upgrades

  • Total capacity4 GB
  • Rated speedDDR3 1866 (PC3 14900)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL13
  • Rated voltage1.5 V
  • Buffer typeUnbuffered
  • ECC protection guards data integrity with built-in error correction
  • 1866 MHz DDR3 speed moves data quickly at PC3-14900 rate
  • CL13 latency keeps response tight for server workloads
  • 50 V standard voltage fits existing DDR3 platforms without changes
  • 240-pin UDIMM form factor slots into compatible HP 733036-581 systems

A-Tech 4GB DDR3 ECC UDIMM Server Memory

This A-Tech module provides 4GB of DDR3 1866 ECC unbuffered memory for compatible server and workstation systems. It operates at standard 1.50V with CL13 latency and uses a 1Rx8 configuration on a 240-pin DIMM form factor.

Replaces HP 733036-581 and E2Q91AA part numbers

The module serves as a direct equivalent for HP part numbers 733036-581 and E2Q91AA. The upgrade is worthwhile when your system requires ECC UDIMM memory at DDR3 1866 speed and has available DIMM slots for capacity expansion.

Verify your system supports DDR3 1866 ECC UDIMM

Check that your motherboard accepts unbuffered ECC DDR3 memory at this speed and rank configuration before ordering. Consult your system documentation for supported memory specifications and maximum capacity limits per slot.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $21.99
Cheaper than about 94% of the 6,523 comparable items (median $188.99).
Total capacity 4 GB
Lower than about 95% of the 6,064 comparable items (median 32 GB).
Price per GB $5.50 per GB
Cheaper than about 69% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameA-Tech
Total capacity4 GB
Performance
Rated speedDDR3 1866 (PC3 14900)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL13
ECC supportYes
Buffer typeUnbuffered
Memory rank1Rx8
Power
Rated voltage1.5 V

Questions about this item

Will this 240-pin DDR3 UDIMM fit my HP server that uses part 733036-581?

Yes, it is a direct equivalent for HP part numbers 733036-581 and E2Q91AA and uses the standard 240-pin DDR3 DIMM form factor.

What is the correct way to install this ECC UDIMM and what step is often missed?

Power off the server, open the chassis, align the notch on the 240-pin module with the slot key, press firmly until both retention clips click, then verify in BIOS that ECC is enabled.

Does this 1.5 V DDR3 module need any firmware updates or battery replacements over its lifetime?

No firmware or battery maintenance is required; the module is validated for lifetime reliability and only needs replacement if a memory error appears in system logs.

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