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CMS 512MB (1X512MB) DDR1 2100 266MHZ ECC Registered DIMM Memory Ram Upgrade Compatible with Cisco® 2811 Router Main Memory DMemory Ram Upgrade2811-512D for Server Only - C89
Computer Memory Solutions

CMS 512MB (1X512MB) DDR1 2100 266MHZ ECC Registered DIMM Memory Ram Upgrade

Bottom line: The CMS 512MB DDR1 2100 266MHZ ECC Registered DIMM Memory Ram Upgrade is a specs-and-price decision rather than a crowd-consensus one in the memory & ram category. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.

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By , Founder & Editor-in-Chief · Listing data updated

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.

Pros & Cons

Pros

  • ✓ Computer Memory Solutions guarantees compatibility with models provided in description.
  • ✓ Backed by Computer Memory Solutions's warranty and support channels

Cons

  • ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
  • ✗ Price, stock, shipping and returns are set by the retailer and may have changed since this page was last updated

Manufacturer description

Compatible with Cisco 2811 Router main memory DRAM MEM2811-512D 512MB PC2100 ECC NON REG CL2 CMS brand, CMS is one of the most trusted names in the Computer Memory industry and this product carries a Lifetime Warranty from CMS.

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SpecPicks Verdict

SpecPicks scored CMS 512MB DDR1 2100 266MHZ ECC Registered DIMM Memory Ram Upgrade using a rating × review-volume × price-fit model applied to published specs and reviews across the memory & ram category. Computer Memory Solutions'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

  • Computer Memory Solutions guarantees compatibility with models provided in description.
  • Memory Type: ECC Registered DIMM, 184-Pin
  • Speed: DDR-3200, 400 MHz
  • 2 Piece Kit
  • Product appearance may vary. Picture for reference only. limited lifetime warranty when bought directly from computer memory solutions

Full Specifications

BrandComputer Memory Solutions
SpeedDDR-3200, 400 MHz
RAM Size1 GB
Form Factor184-PIN
Memory TypeECC Registered DIMM, 184-Pin
Memory Speed400 MHz
Model NumberCM64723200ENRDX2
Number of Pins184
Mfr Part NumberCM64723200ENRDIMM
Number of Items2
Memory GenerationDDR
Compatible DevicesServer
Memory Form FactorRDIMM
Additional FeaturesEcc, Lightweight, Registered Memory
Computer Memory Size1 GB
RAM Memory TechnologyDDR3
Column Address Strobe Latency2
Full listing titleCMS 512MB (1X512MB) DDR1 2100 266MHZ ECC Registered DIMM Memory Ram Upgrade Compatible with Cisco® 2811 Router Main Memory DMemory Ram Upgrade2811-512D for Server Only - C89

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CMS 512MB (1X512MB) DDR1 2100 266MHZ ECC Registered DIMM Memory Ram Upgrade Compatible with Cisco® 2811 Router Main Memory DMemory Ram Upgrade2811-512D for Server Only - C89 is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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CMS 512MB (1X512MB) DDR1 2100 266MHZ ECC Registered DIMM Memory Ram Upgrade Compatible with Cisco® 2811 Router Main Memory DMemory Ram Upgrade2811-512D for Server Only - C89
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