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Black 288-pin DIMM module with black PCB and silver contacts

HP

HP 3TK85AT 4GB DDR4 desktop RAM

SKU CH-9AWZ-2JPFH MPN 3TK85AT

A 4 GB DDR4 desktop memory module running at 2666 MHz for compatible HP systems

  • Total capacity4 GB
  • Product colorBlack
  • Adds 4 GB of DDR4 memory at 2666 MHz
  • Non-ECC unbuffered design for standard desktop PCs
  • Single 288-pin DIMM module for simple installation
  • Qualified for HP ProDesk, EliteDesk and 280/285/290 series systems
  • WEEE certified and manufactured by HP Inc.

HP 4GB DDR4 Desktop Module

This HP 3TK85AT module adds 4GB of DDR4 memory to compatible desktop PCs. It runs at 2666 MHz as a single unbuffered DIMM. The 288-pin form factor fits standard desktop slots. Non-ECC operation suits everyday office and home workloads.

Sustained Load Behaviour

Under continuous use the DDR4-2666/PC4-21333 rating maintains its specified data rate without throttling. Unbuffered signal processing keeps latency low during extended sessions. Non-ECC design means error correction is not performed on long-running tasks. The module draws standard DDR4 voltage for stable output.

Compatibility Check Before Ordering

Verify that your motherboard accepts 288-pin DDR4 DIMMs running at 2666 MHz. Confirm an available slot for a single 4GB stick. Cross-reference your system model against the listed HP platforms such as ProDesk 400 G5 or EliteDesk 800 G4. Ensure the BIOS supports non-ECC unbuffered memory.

How it compares

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

Price $46.99
Cheaper than about 68% of the 3,647 comparable items (median $90.99).
Total capacity 4 GB
Lower than about 80% of the 3,251 comparable items (median 16 GB).
Price per GB $11.75 per GB
Pricier than about 74% of the 3,251 comparable items (median $6.75 per GB).

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Specifications

Product
Brand nameHP
Total capacity4 GB
Product colorBlack
Size & build
Shipping weight0.16 kg
Package size457 × 305 × 203 mm

Questions about this item

How much power does the 2666 MHz DDR4 module draw during continuous operation?

The 288-pin DIMM is an unbuffered, non-ECC design rated for standard DDR4 voltage, so power draw stays low even when the system runs all day.

Which motherboard slot and platform are required for this 4 GB stick to function?

It needs a desktop board with a 288-pin DDR4 DIMM slot; the module is validated on HP ProDesk 400 G5, 600 G4, EliteDesk 705 G4 and 800 G4 systems.

Will this 2666 MHz stick down-clock reliably in an older PC that only supports 2133 MHz DDR4?

Yes, the DDR4-2666/PC4-21333 rating means it will run at the lower speed the motherboard allows without compatibility issues.

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