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Two green DDR3 DIMM sticks, no heat spreaders

Computer Memory Solutions

Computer Memory Solutions 4GB (2x2GB) DDR3 1333 ECC Unregistered DIMM Z400 B74

SKU CH-7CY7-M5KPF

A 4 GB DDR3 ECC unregistered kit of two 2 GB modules running at 1333 MHz for HP Z400 workstations

  • Total capacity4 GB (2 × 2 GB)
  • Rated speedDDR3 1333 (PC3 10600)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL9
  • Memory timings9-9-9
  • Rated voltage1.5 V
  • ECC protection detects and corrects data errors
  • 1333 MHz DDR3 speed matches Z400 specifications
  • 2x2GB kit enables triple-channel configuration
  • Unregistered DIMM design fits Z400 workstation slots
  • 5V standard voltage ensures stable operation

Z400 ECC memory kit

This kit provides 4 GB of DDR3 ECC unregistered memory in two 2 GB modules built for the HP Workstation Z400. It suits technicians restoring or expanding an existing Z400 where error-correcting RAM is required.

240-pin unregistered DIMMs

The modules use a standard 240-pin DDR3 interface without heat spreaders, operating at 1.5 V with CL9 9-9-9 timing. They install in the Z400's three-channel slots and can be added one at a time, though populating all three channels enables triple-channel interleaving.

Two-module pack

The package contains two matching sticks so you can populate a pair of slots immediately. CMS backs the kit with a limited lifetime warranty when purchased directly, and notes that module appearance may vary from the reference photo.

How it compares

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

Price $34.99
Cheaper than about 83% of the 21,161 comparable items (median $397.99).
Total capacity 4 GB (2 × 2 GB)
Lower than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $8.75 per GB
Typical for this category: the median of 20,941 items is $8.19 per GB.

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM2567210600ECCNRDIMM2R8
Total capacity4 GB (2 × 2 GB)
Product type240-Pin DDR3 SDRAM
Performance
Rated speedDDR3 1333 (PC3 10600)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL9
Memory timings9-9-9
ECC supportYes
Buffer typeUnregistered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.5 V
Compatibility
Compatible systemsHp Workstation Z400 Workstation
In the box
Included items2 Memory RAM Sticks

Questions about this item

What DDR3 speed does this kit run at, and what is the practical ceiling on a Z400?

The kit is rated DDR3-1333 (PC3-10600). On a Z400 the modules will clock down to 1066 MHz or 800 MHz depending on the Xeon model and how many DIMMs are populated.

What physical slot and form factor do these modules need?

They are 240-pin DDR3 DIMMs. The Z400 accepts them in its standard DIMM sockets — three per CPU, six total — and the kit contains two unbuffered ECC sticks.

How are they installed, and what step is often missed for best performance?

Insert each stick into a DIMM slot until the latches click. For triple-channel speed on the Z400, populate all three channels (one DIMM per channel) rather than filling a single bank.

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