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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

  • Capacity4GB
  • Type240-Pin DDR3 Non-ECC UDIMM
  • SpeedDDR3 1600 (PC3 12800)
  • CAS LatencyCL11
  • Voltage1.5V
  • ECCNo
  • 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.

Highlights

  • 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

Specifications

BrandOWC
Part Number1U6D31R804GB
Capacity4GB
Type240-Pin DDR3 Non-ECC UDIMM
SpeedDDR3 1600 (PC3 12800)
CAS LatencyCL11
Voltage1.5V
ECCNo
Buffered/RegisteredUnbuffered
Rank1Rx8
Heat SpreaderNo
Compatible SystemHP 280 G1
HP 285 G2
HP 6305 Pro SFF
HP 6305 Pro Tower

Other versions of this model

5 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

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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