Replacement for 647899-B21: Drop-In Alternatives We Stock
Looking for a replacement for the 647899-B21 (647899-B21 - HP 8GB PC3-12800 DDR3-1600MHz ECC Registered CL11 240-Pin DIMM Single Rank Memory Module)? Pro Disk Network ships HP drop-in replacements and equivalent modern parts from US inventory. Every alternate below is in-stock today with same-day shipping for orders placed before 2pm ET. If your unit is still under warranty, contact our engineering team — we offer cross-shipping for B2B customers on Net 30 terms.
About the 647899-B21
| SKU | 647899-B21 |
|---|---|
| Product | 647899-B21 - HP 8GB PC3-12800 DDR3-1600MHz ECC Registered CL11 240-Pin DIMM Single Rank Memory Module |
| Current price | $71.58 |
| Stock status | In Stock |
| Detail page | View 647899-B21 › |
Drop-in replacements for 647899-B21
Each part below is currently in our US warehouse, ships same-day for orders before 2pm ET, and includes our 90-day warranty. SKUs link to the full product page with photos, datasheets and B2B quote form.
647899-B21N - HP 8GB DDR3-1600MHz PC3-12800 ECC Registered CL11 240-Pin DIMM 1.35V Low Voltage Single Rank Memory Module
SKU: 647899-B21N
Price: $94.53
647899-S21 - HP 8GB DDR3-1600MHz PC3-12800 ECC Registered CL11 240-Pin DIMM 1.35V Low Voltage Single Rank Memory Module
SKU: 647899-S21
Price: $94.53
647899-48G - HP 48GB Kit (6 X 8GB) DDR3-1600MHz PC3-12800 ECC Registered CL11 240-Pin DIMM Single Rank Memory
SKU: 647899-48G
Price: $529.28
647899-64G - HP 64GB Kit (8 X 8GB) DDR3-1600MHz PC3-12800 ECC Registered CL11 240-Pin DIMM Single Rank Memory
SKU: 647899-64G
Price: $708.83
647899-96G - HP 96GB Kit (12 X 8GB) DDR3-1600MHz PC3-12800 ECC Registered CL11 240-Pin DIMM Single Rank Memory
SKU: 647899-96G
Price: $1,067.97
HP 647899-B21#ABA 8GB PC3-12800 DDR3-1600MHz ECC Registered CL11 RDIMM Single-Rank Memory Module
SKU: 647899-B21-ABA
Price: $94.53
HP 647899-B21#0D1 8GB PC3-12800 DDR3-1600MHz ECC Registered CL11 RDIMM Single-Rank Memory Module
SKU: 647899-B21-0D1
Price: $94.53
647899-B212 - HP 8GB PC3-12800 DDR3-1600MHz ECC Registered CL11 RDIMM Single-Rank Memory Module
SKU: 647899-B212
Price: $94.53
731656-081 - HP 8GB DDR3-1600MHz PC3-12800 ECC Registered CL11 240-Pin DIMM 1.35V Low Voltage Single Rank Memory Module
SKU: 731656-081
Price: $47.37
731765-S21 - HP 8GB DDR3-1600MHz PC3-12800 ECC Registered CL11 240-Pin DIMM 1.35V Low Voltage Single Rank Memory Module
SKU: 731765-S21
Price: $47.37
How we pick replacements
Every recommendation above was selected using these criteria:
- Drop-in compatibility — same form factor (2.5"/3.5", PCIe slot, SFP port, etc.), so it fits the original chassis without modification
- Equivalent or better performance — matched on RPM/IOPS/speed/throughput, never downgraded
- Same-brand-preferred — we list the OEM-equivalent first when available, then trusted aftermarket
- Warranty coverage — 90-day Pro Disk warranty on every part, with 1-year option for B2B
- In stock today — never recommend a part that is on backorder
Need help confirming compatibility?
Our engineers validate every replacement against your specific server, switch, or chassis model before shipment. Email sales@prodisknetwork.com with your platform model (e.g., Dell PowerEdge R740, HP DL380 Gen10, Cisco Catalyst 9300) and we will confirm the exact part number that drops into your hardware.