HP Q7721A-RO 128MB DDR-266MHz PC2100 Non-ECC Unbuffered CL2.5 200-Pin SODIMM Single Rank Memory

Product Description

The HP Q7721A-RO is a 128MB memory module specifically designed to meet the requirements of certain HP computing systems. This module operates at DDR-266MHz speed, conforming to the PC2100 standard, which was common in older generations of desktop and mobile computers. The SODIMM form factor indicates its suitability for compact devices like laptops, small form factor PCs, or specific HP workstations and servers where space is a constraint. Key technical specifications include its Non-ECC (Error-Correcting Code) and Unbuffered nature. Non-ECC memory is standard for most consumer and many business systems, whereas ECC memory is typically found in servers and workstations where data integrity is critical. Unbuffered memory means that the memory controller communicates directly with the memory module, which can offer slightly faster response times in some configurations but is generally less scalable than buffered memory. With 200 pins and a Single Rank configuration, this 128MB module is intended for systems that utilize this specific type of DDR memory. Its compatibility is generally limited to older HP hardware that explicitly lists this part number or these specifications. It's important to verify system compatibility before purchasing, as DDR-266MHz PC2100 SODIMM modules are not interchangeable with newer DDR generations (like DDR2, DDR3, DDR4, etc.).