Replacement for 647909-S21: Drop-In Alternatives We Stock
Looking for a replacement for the 647909-S21 (647909-S21 - HP 8GB DDR3-1333MHz PC3-10600 ECC Unbuffered CL9 240-Pin DIMM 1.35V Low Voltage Dual 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 647909-S21
| SKU | 647909-S21 |
|---|---|
| Product | 647909-S21 - HP 8GB DDR3-1333MHz PC3-10600 ECC Unbuffered CL9 240-Pin DIMM 1.35V Low Voltage Dual Rank Memory Module |
| Current price | $235.96 |
| Stock status | In Stock |
| Detail page | View 647909-S21 › |
Drop-in replacements for 647909-S21
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.
647909-B21 - HP 8GB DDR3-1333MHz PC3-10600 ECC Unbuffered CL9 240-Pin DIMM 1.35V Low Voltage Dual Rank Memory Module
SKU: 647909-B21
Price: $155.79
HP 647909-B21#0D1 8GB PC3-10600 DDR3-1333MHz ECC Unbuffered CL9 UDIMM 1.35V Dual-Rank Memory Module
SKU: 647909-B21-0D1
Price: $209.38
647909-B212 - HP 8GB PC3-10600 DDR3-1333MHz ECC Unbuffered CL9 UDIMM 1.35V Dual-Rank Memory Module
SKU: 647909-B212
Price: $209.38
664696-001 - HP 8GB DDR3-1333MHz PC3-10600 ECC Unbuffered CL9 240-Pin DIMM 1.35V Low Voltage Dual Rank Memory Module
SKU: 664696-001
Price: $155.79
647658-081 - HP 8GB DDR3-1333MHz PC3-10600 ECC Unbuffered CL9 240-Pin DIMM 1.35V Low Voltage Dual Rank Memory Module
SKU: 647658-081
Price: $155.79
647667-071 - HP 8GB DDR3-1333MHz PC3-10600 ECC Unbuffered CL9 240-Pin DIMM Very Low Profile (VLP) Dual Rank Memory Module
SKU: 647667-071
Price: $209.38
647909RB21 - HP 8GB DDR3-1333MHz PC3-10600 ECC Unbuffered CL9 240-Pin DIMM Very Low Profile (VLP) Dual Rank Memory Module
SKU: 647909RB21
Price: $209.38
687469-001 - HP 8GB DDR3-1333MHz PC3-10600 ECC Unbuffered CL9 240-Pin DIMM 1.35V Low Voltage Dual Rank Memory Module
SKU: 687469-001
Price: $209.38
647658-181 - HP 8GB DDR3-1333MHz PC3-10600 ECC Unbuffered CL9 240-Pin DIMM 1.35V Low Voltage Dual Rank Memory Module
SKU: 647658-181
Price: $209.38
FX613A - HP 8GB Kit (2 X 4GB) DDR3-1333MHz PC3-10600 ECC Unbuffered CL9 240-Pin DIMM 1.35V Low Voltage Memory
SKU: FX613A
Price: $215.79
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.