Crucial

Crucial 2GB Single DDR2 667MHz (PC2-5300) CL5 Unbuffered UDIMM 240-Pin Desktop Memory Module CT25664AA667

Name: Crucial 2GB Single DDR2 667MHz (PC2-5300) CL5 Unbuffered UDIMM 240-Pin Desktop Memory Module CT25664AA667
Brand: Crucial
SKU: B000FGD3WQ
Price: 15.95 USD
Availability: InStock

Bottom line: The Crucial 2GB Single DDR2 667MHz ($15.95 on Amazon as of 2026-10-06): 2GB DDR2-667 (PC2-5300) module for aging desktops; main trade-off: DDR2-667 only; won't hit 800MHz board speeds.

$15.95

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🛒 See live eBay price Also on Amazon — $15.95 Compare to similar memory & ram

By Mike Perry, Founder & Editor-in-Chief · Listing data updated 2026-10-06

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference. About the author →

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

Pros & Cons

Pros

✓ 2GB DDR2-667 (PC2-5300) module for aging desktops
✓ CL5 latency spec matches most 2006-2009 boards
✓ Crucial/Micron-made for tested reliability
✓ 240-pin unbuffered UDIMM, standard desktop fit

Cons

✗ DDR2-667 only; won't hit 800MHz board speeds
✗ 2GB single stick, not a dual-channel kit
✗ Obsolete standard; no use in DDR3/DDR4 systems
✗ Unbuffered, so no ECC or server support

Manufacturer description

Every day, you rely on your computer to make your life easier. A Crucial DRAM upgrade can help your system run faster, and it's one of the easiest, most affordable ways to improve system performance. Reap the benefits doing everything from everyday system tasks to mission-critical applications. For over 12 years, Crucial has been recognized as a leader in DRAM upgrades. Our products help people achieve greater system performance through improved productivity, reliability, and speed. As part of one of the world’s largest DRAM manufacturers—Micron Technology—our long tenure of engineering and…

SpecPicks Verdict

SpecPicks scored Crucial 2GB Single DDR2 667MHz (PC2-5300) CL5 Unbuffered UDIMM… using a rating × review-volume × price-fit model applied to published specs and reviews across the memory & ram category. Crucial's memory & ram lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for memory & ram of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

Storage Capacity - 2GB
Technology - DDR2 SDRAM
Form Factor - 240-pin DIMM
Technology - DDR2 SDRAM
Memory Speed -- 667MHz DDR2-667/PC2-5300

Full Specifications

Brand	Crucial
Voltage	1.8 Volts
RAM Size	2 GB
Model Name	MICRON CONSUMER PRODUCTS GROUP, INC
Unit Count	1.0 Count
Form Factor	Desktop
Memory Speed	667 MHz
Model Number	CT25664AA667
Number of Pins	240
Mfr Part Number	CT25664AA667
Memory Generation	DDR2
Compatible Devices	Desktop
Data Transfer Rate	667 MHz
Memory Form Factor	UDIMM
Additional Features	Lightweight
Computer Memory Size	2 GB
RAM Memory Technology	DDR2 667
Column Address Strobe Latency	5
Global Trade Identification Number	00649528733252

Ready to buy?

Crucial 2GB Single DDR2 667MHz (PC2-5300) CL5 Unbuffered UDIMM 240-Pin Desktop Memory Module CT25664AA667 is vintage hardware; the used and vintage market on eBay carries most of the live inventory. Prices and condition vary by seller and move in real time, so we link the live listing rather than quote a cached price. It also has an Amazon listing — check it for current price and availability. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.