**Smart Modular 2GB PC2-5300F DDR2-667MHz ECC Fully Buffered FB-DIMM Server Memory ModuleModel/Part Number:** HYS72T256920HFA (Built with premium enterprise components)**Brand:** Smart Modular Technologies**Capacity:** 2GB (1x 2GB Module)**Memory Type:** DDR2 SDRAM Fully Buffered (FB-DIMM Architecture)**Bus Speed:** PC2-5300F (DDR2-667)**Specs:** 2Rx4 / 2Rx8 Data Architecture | 240-Pin | 1.8V Standard | Integrated AMB Chip⚠️ CRITICAL COMPATIBILITY WARNING - PLEASE READ BEFORE BUYING ⚠️This is FULLY BUFFERED DDR2 SERVER MEMORY (FB-DIMM). It features a distinct physical notch and an integrated Advanced Memory Buffer (AMB) architecture. This module is NOT compatible with standard consumer desktop PCs, gaming motherboards, home office computers, laptops, or standard unbuffered/registered DDR2 systems. It is engineered EXCLUSIVELY for specific legacy enterprise server blades and workstations (such as Dell PowerEdge 1950/2950/2900, HPE ProLiant G5 series, or legacy Apple Mac Pro Gen 1/2 towers) that specifically require PC2-5300F memory arrays. Please fully verify your motherboard technical manual before purchasing.PRODUCT SPECIFICATIONS:- Module Capacity: 2 GB- Frequency: 667 MHz / MT/s- ECC Type: ECC Fully Buffered (FB-DIMM)- Form Factor: 240-Pin Server FBDIMM- Voltage: 1.8V (Standard operating thermal profile)ITEM CONDITION:- Used / Clean pull from a working professional legacy server infrastructure setup.- 100% fully tested with professional diagnostic stress-testing utilities (Zero memory array errors).- Electrostatic Discharge (ESD) safe handling and premium protective packaging.- Listing is for one (1) single 2GB module. Multiple quantities available in the dropdown selection.---IMPORTANT SELLER POLICY:- Anti-Fraud Measure: The unique integrated serial numbers, component batch codes, and hardware signatures visible on the memory labels have been logged and officially recorded during testing to prevent component swapping.- No Partial Refunds: We strictly do not offer partial refunds under any circumstance. If you are unsatisfied with the item, you must open an official return request for a full refund upon returning the exact serial-numbered memory module(s).