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Green rectangular circuit board with gold edge connectors and black memory chips on both sides

OWC

OWC 1U8D31R804GB 4GB DDR3 1866MHz CL13 desktop RAM

SKU CH-FP88-KRTGJ

A 4 GB DDR3 desktop DIMM running at 1866 MHz with CL13 latency and 1.5 V operation

  • Total capacity4 GB
  • Rated speedDDR3 1866 (PC3 14900)
  • CAS latency13
  • Rated voltage1.5 V
  • Buffer typeUnbuffered
  • Recommended forDesktops
  • Boosts system responsiveness with a 4GB DDR3 1866MHz module
  • Meets JEDEC and RoHS standards for a warranty-safe upgrade
  • Simple DIY installation fits standard 240-pin desktop slots
  • Runs at 1.5V CL13 without ECC for broad compatibility
  • Direct replacement for Crucial CTM345S ensures correct fit

Capacity and Type

This OWC module provides 4GB of DDR3 desktop memory in a single 240-pin DIMM. It runs at 1866MHz with a CAS latency of 13 and operates at the standard 1.5V. The part is unbuffered, non-ECC and has no heat spreader.

Upgrade Suitability

The stick is a direct replacement for Crucial CTM345S and fits desktops or workstations that accept DDR3 1866 PC3-14900 modules. Systems requiring ECC, registered DIMMs, a different voltage or a higher density per slot should look at other parts.

Deciding Specification

The 1866MHz DDR3 speed combined with CL13 timing at 1.5V determines whether this module matches the motherboard's supported memory standard. Verify that the platform lists PC3-14900 240-pin unbuffered non-ECC DIMMs before purchasing.

How it compares

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

Price $17.99
Cheaper than about 90% 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).
CAS latency 13
Lower than about 90% of the 57 comparable items (median 40).
Price per GB $4.50 per GB
Cheaper than about 79% 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
Brand nameOWC
Part number1U8D31R804 GB
Total capacity4 GB
Product colorStandard
Performance
Rated speedDDR3 1866 (PC3 14900)
Memory
CAS latency13
ECC supportNo
Buffer typeUnbuffered
Heat spreaderNo
Power
Rated voltage1.5 V
Compatibility
Recommended forDesktops
More details
LED lightingNone

Questions about this item

What motherboard slot and voltage does this 240-pin 1.5 V DDR3 DIMM require?

It fits a standard 240-pin desktop DDR3 slot and runs at 1.5 V.

Will this CL13 1866 MHz module run stably alongside my existing CL11 1866 MHz DDR3 sticks?

The system will clock all modules to the slowest common timing; the CL13 module will operate at CL11 when paired with CL11 memory.

How can I confirm the module is recognised at 1866 MHz CL13 after installation?

Check BIOS or a tool such as CPU-Z; it should report DDR3 1866 MT/s, PC3-14900 and CAS latency 13.

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