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Green 240-pin DDR3 UDIMM module with black chips and gold contacts

OWC

OWC 4GB DDR3 1600 CL11 1Rx8 240-pin 1.5V UDIMM memory upgrade

SKU CH-Z447-VG8J8

4GB DDR3 1600 CL11 UDIMM upgrade for HP 280 G1, 285 G2 and 6305 Pro desktops

  • Total capacity4 GB
  • Rated speedDDR3 1600 (PC3 12800)
  • CAS latencyCL11
  • Rated voltage1.5 V
  • Buffer typeUnbuffered
  • Memory rank1Rx8
  • Boosts system responsiveness with 4 GB DDR3 1600 CL11 module
  • JEDEC and RoHS compliant for warranty-safe upgrade
  • Tested to meet or exceed OEM specs for HP 280 G1, 285 G2, 6305 Pro
  • Simple DIY installation with unbuffered 240-pin DIMM at 1.5 V
  • Backed by limited lifetime warranty and free tech support

4GB DDR3 upgrade for HP desktops

This 4 GB DDR3 1600 module is built for HP 280 G1, 285 G2, 6305 Pro SFF and 6305 Pro Tower systems. It uses a single unbuffered 240-pin UDIMM rated at 1.5 V with CL11 latency. The part is new and validated to JEDEC and RoHS standards.

Fits a single DIMM slot on supported HP boards

Installation requires an available 240-pin DDR3 slot and a motherboard that accepts 1Rx8 non-ECC modules at 1.5 V. The upgrade leaves other slots free for additional memory and does not need a heat spreader or active cooling.

Replaces slower or smaller DDR3 modules

Swapping an existing lower-capacity or lower-speed DDR3 stick for this 4 GB PC3-12800 unit adds headroom for multitasking and larger files. The jump is worthwhile when the current configuration limits everyday responsiveness or prevents running several applications together. Buyers who need ECC, registered DIMMs, or a different voltage should look elsewhere.

How it compares

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

Price $18.99
Cheaper than about 91% 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 $4.75 per GB
Cheaper than about 80% of the 20,941 comparable items (median $8.19 per GB).

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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 280 G1
HP 285 G2
HP 6305 Pro SFF
HP 6305 Pro Tower

Other versions of this model

5 more in the same range

Questions about this item

Does the CL11 latency limit throughput when the module runs at 1600 MHz all day?

The module is rated CL11 at DDR3 1600 and follows JEDEC timing tables, so latency stays within spec during sustained operation.

How much heat does the 1.5 V unbuffered DIMM produce without a spreader during continuous load?

Running at standard 1.5 V with no heat spreader, the stick relies on case airflow; JEDEC-compliant DDR3 at this voltage typically stays within normal desktop thermal limits.

Which HP desktop must I already own for this 240-pin DDR3 stick to work?

Compatible systems are HP 280 G1, HP 285 G2, HP 6305 Pro SFF and HP 6305 Pro Tower.

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