Replacement for 647889-B21: Drop-In Alternatives We Stock
Looking for a replacement for the 647889-B21 (647889-B21 - Compaq 8GB DDR3-1600MHz PC3-12800 ECC Registered CL11 240-Pin DIMM Dual Rank Memory Module)? Pro Disk Network ships 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 647889-B21
| SKU | 647889-B21 |
|---|---|
| Product | 647889-B21 - Compaq 8GB DDR3-1600MHz PC3-12800 ECC Registered CL11 240-Pin DIMM Dual Rank Memory Module |
| Current price | $166.78 |
| Stock status | In Stock |
| Detail page | View 647889-B21 › |
Drop-in replacements for 647889-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.
647889-B21N - HP 8GB PC3-12800 DDR3-1600MHz ECC Registered CL11 RDIMM Dual-Rank 1.35V Memory Module
SKU: 647889-B21N
Price: $108.82
Kingston KTH-PE316/8G 8GB PC3-12800 DDR3-1600MHz ECC Registered CL11 RDIMM Dual-Rank Memory Module for HP/Compaq
SKU: KTH-PE316-8G
Price: $98.75
Dataram DRH1600RS/8GB 8GB DDR3-1600MHz PC3-12800 ECC Registered CL11 240-Pin DIMM Single Rank Memory Module
SKU: DRH1600RS-8GB
Price: $84.28
Dataram DRH81600RS/8GB 8GB DDR3-1600MHz PC3-12800 ECC Registered CL11 240-Pin DIMM Single Rank Memory Module
SKU: DRH81600RS-8GB
Price: $84.28
Dataram DRHA1600RS/8GB 8GB DDR3-1600MHz PC3-12800 ECC Registered CL11 240-Pin DIMM Single Rank Memory Module
SKU: DRHA1600RS-8GB
Price: $84.28
Dataram DRL1600RS/8GB 8GB DDR3-1600MHz PC3-12800 ECC Registered CL11 240-Pin DIMM Single Rank Memory Module
SKU: DRL1600RS-8GB
Price: $84.28
Dataram DRIHS23S/8GB 8GB DDR3-1600MHz PC3-12800 ECC Registered CL11 240-Pin DIMM Very Low Profile (VLP) Single Rank Memory Module
SKU: DRIHS23S-8GB
Price: $84.28
Dataram DRIX1600RS/8GB 8GB DDR3-1600MHz PC3-12800 ECC Registered CL11 240-Pin DIMM Single Rank Memory Module
SKU: DRIX1600RS-8GB
Price: $84.28
Dataram DRIX1600RLS/8GB 8GB DDR3-1600MHz PC3-12800 ECC Registered CL11 240-Pin DIMM 1.35V Low Voltage Single Rank Memory Module
SKU: DRIX1600RLS-8GB
Price: $89.70
Dataram DRIHS23SL/8GB 8GB DDR3-1600MHz PC3-12800 ECC Registered CL11 240-Pin DIMM 1.35V Low Voltage Very Low Profile (VLP) Single Rank Memory Module
SKU: DRIHS23SL-8GB
Price: $89.70
Dataram DRL1600RLS/8GB 8GB DDR3-1600MHz PC3-12800 ECC Registered CL11 240-Pin DIMM 1.35V Low Voltage Single Rank Memory Module
SKU: DRL1600RLS-8GB
Price: $89.70
UCS-EZ-8GB-MEM - Cisco 8GB DDR3-1600MHz PC3-12800 ECC Registered CL11 240-Pin DIMM Dual Rank Memory Module
SKU: UCS-EZ-8GB-MEM
Price: $145.07
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.