HP 4GB PC2-6400 Registered Memory Kit (497765-B21) is an enterprise server memory upgrade consisting of two 2GB single-rank DDR2-800 Registered DIMMs, providing 4GB total capacity. The memory is designed for compatible HP ProLiant servers using AMD Opteron processors and is intended for reliable enterprise server and workstation-class workloads. HPE documentation identifies this option as a PC2-6400 (DDR2-800) Registered Memory Kit.
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Part Number: 497765-B21
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Manufacturer: HP / Hewlett-Packard
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Total Capacity: 4GB
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Memory Configuration: 2 × 2GB DIMMs
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Memory Type: DDR2 SDRAM
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Memory Standard: PC2-6400
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Memory Speed: 800MHz
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ECC: Yes
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Registered: Yes
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Rank: Single Rank
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DIMM Configuration: 2GB per module
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Kit Type: Matched 2-DIMM memory kit
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Application: Enterprise servers, virtualization, business applications, and general server workloads
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Compatible Systems: HP ProLiant systems supporting PC2-6400 Registered DDR2 memory, including compatible BL495c G5/G6, BL465c G6, DL165 G6, DL585 G5, and DL785 G6 configurations.
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Compatible Processors: Designed for compatible AMD Opteron-based HP ProLiant platforms; supported processor models vary by server generation.
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Installation: Memory is generally installed in matched pairs on the supported platforms.
