HP 4GB 1Rx4 PC3-10600R-9 RDIMM (593339-B21) is a genuine HP server memory kit containing one 4GB DDR3 Registered DIMM. It uses a single-rank x4 organization, operates at 1333MHz (PC3-10600) with CAS latency 9, and is designed for compatible HP ProLiant servers and server blades supporting DDR3 RDIMM memory. HP QuickSpecs specifically identify 593339-B21 as a 4GB (1x4GB) Single Rank x4 PC3-10600 DDR3-1333 Registered CAS-9 Memory Kit.
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Part Number: 593339-B21
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Manufacturer: HP / HPE
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Product Type: Server Memory Module / RDIMM
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Memory Capacity: 4GB (4096MB)
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Module Configuration: 1 × 4GB DIMM
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Memory Type: DDR3 SDRAM
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Speed: 1333MHz
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Memory Standard: PC3-10600R
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Rank: 1Rx4 — Single Rank x4
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ECC: Yes
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Registered / Buffered: Registered DIMM (RDIMM)
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CAS Latency: CL9
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Pin Count: 240-pin DIMM
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Voltage: 1.5V nominal for standard PC3-10600 DDR3
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Form Factor: Full-size DIMM
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Application: Enterprise server memory
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Compatible Platforms: HP ProLiant servers and server blades supporting DDR3-1333 Registered DIMMs, including compatible G6/G7 platforms such as DL360 G6/G7, DL380 G6 and BL460c G6.
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Related HP Option: 593339-S21 is the corresponding S-Buy version of the same 4GB 1Rx4 PC3-10600R-9 memory specification.
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Part Configuration: One DIMM per memory kit; HP documentation confirms the kit contains a single DIMM.