We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Green rectangular DDR4 DIMM module with black chips

HP

HP 3TK85AT 4GB DDR4-2666 desktop RAM

SKU CH-YT7C-9FQCT

4GB DDR4-2666 desktop DIMM adds 4GB of system memory at 2666 MT/s

  • Total capacity4 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • 4 GB capacity for everyday desktop tasks
  • DDR4 2666 speed rated at PC4 21300
  • New HP module ready for installation
  • MPN 3TK85AT identifies the exact part

HP 3TK85AT 4GB DDR4-2666 DIMM

This HP 3TK85AT module provides 4GB of DDR4 memory rated at 2666 MT/s (PC4-21300). It is a standard unbuffered DIMM intended for desktop systems that accept DDR4 memory. Builders upgrading an office PC or assembling a basic workstation will find the capacity suitable for everyday productivity tasks.

Supplied as a single memory module

The package contains only the memory module itself with no additional cables, brackets or software utilities. Buyers who need a matched pair for dual-channel operation must purchase a second identical stick separately. Systems requiring more than 4GB total capacity will need additional modules or higher-density alternatives.

How it compares

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

Price $15.99
Cheaper than about 92% 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 $4.00 per GB
Cheaper than about 84% of the 3,251 comparable items (median $6.75 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
Total capacity4 GB
Performance
Rated speedDDR4 2666 (PC4 21300)

Questions about this item

Will the 4GB DDR4-2666 DIMM need replacement if I upgrade to a higher capacity later?

The module is a single 4GB stick; adding more memory means populating free slots, while replacing it would be necessary only if every slot is already filled.

What limit appears first during sustained heavy workloads with this DDR4-2666 kit?

The 4GB capacity will bottleneck multitasking and large datasets long before the 2666 MT/s speed ceiling becomes the limiting factor.

More in Desktop RAM

Similar items