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Green circuit board with gold edge contacts, black memory chips, no heat spreader

OWC

OWC 4GB DDR3 1600 CL11 240-pin 1.5V UDIMM memory upgrade HP ProDesk 600 G1

SKU CH-5BWC-3YM7P

4GB DDR3 1600 CL11 UDIMM upgrades HP ProDesk 600 G1 SFF and Tower systems

  • Total capacity4 GB
  • Rated speedDDR3 1600 (PC3 12800)
  • CAS latencyCL11
  • Rated voltage1.5 V
  • Buffer typeUnbuffered
  • Memory rank1Rx8
  • Boost PC responsiveness with a 4 GB DDR3 upgrade
  • JEDEC and RoHS compliant for warranty-safe installation
  • CL11 latency at 1600 MHz DDR3 speed
  • Single-rank 1Rx8 unbuffered module fits 240-pin slots
  • Designed for HP ProDesk 600 G1 SFF and Tower

HP ProDesk 600 G1 memory upgrade

This 4 GB DDR3 1600 module is built for HP ProDesk 600 G1 SFF and Tower systems. It adds a single 240-pin UDIMM running at 1.5 V with CL11 timing. The part is JEDEC-standard and non-ECC. Buyers who need ECC, registered DIMMs or a different DDR generation cannot use this module.

Replaces slower or smaller factory DIMMs

Swapping a 2 GB or lower-speed stick for this PC3-12800 part raises total capacity and bandwidth. The jump is worth it when the system feels sluggish with multiple browser tabs or office apps open. If the board already runs at 1600 MHz with matched ranks, the gain will be smaller.

Simple DIY installation

Power off, open the case and press the module into the empty 240-pin slot until the latches click. Common issues include mixing ranks or speeds, forgetting to seat the stick fully, or leaving the PSU switched on. The supplier provides a basic installation video for reference.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $17.99
Cheaper than about 92% of the 21,161 comparable items (median $397.99).
Total capacity 4 GB
Lower than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $4.50 per GB
Cheaper than about 81% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameOWC
Part number1U6D31R804 GB
Total capacity4 GB
Product type240-Pin DDR3 Non-ECC UDIMM
Performance
Rated speedDDR3 1600 (PC3 12800)
Memory
CAS latencyCL11
ECC supportNo
Buffer typeUnbuffered
Memory rank1Rx8
Heat spreaderNo
Power
Rated voltage1.5 V
Compatibility
Compatible systemsHP ProDesk 600 G1 SFF
HP ProDesk 600 G1 Tower

Other versions of this model

5 more in the same range

Questions about this item

Will the 240-pin DDR3 DIMM fit the HP ProDesk 600 G1 SFF or Tower?

Yes, the 240-pin DDR3 UDIMM matches the desktop memory slots in both the HP ProDesk 600 G1 SFF and Tower models.

What is the correct way to seat the 1.5V module so it locks in place?

Align the notch on the module with the slot key, press down firmly until both side clips snap closed — partial insertion is the common mistake.

Does the CL11 1Rx8 stick require any future firmware updates or battery changes?

No, DDR3 UDIMM memory has no firmware, battery or moving parts; it only needs replacement if a module fails or you want more capacity.

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