Replacement for 816645-B21: Drop-In Alternatives We Stock
Looking for a replacement for the 816645-B21 (816645-B21 - HP 2.20GHz 9.6GT/s QPI 55MB Cache Socket FCLGA2011 Intel Xeon E7-8880 V4 22-Core Processor)? 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 816645-B21
| SKU | 816645-B21 |
|---|---|
| Product | 816645-B21 - HP 2.20GHz 9.6GT/s QPI 55MB Cache Socket FCLGA2011 Intel Xeon E7-8880 V4 22-Core Processor |
| Current price | $105.26 |
| Stock status | In Stock |
| Detail page | View 816645-B21 › |
Drop-in replacements for 816645-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.
816645-L21 - HP 2.20GHz 9.6GT/s QPI 55MB Cache Socket FCLGA2011 Intel Xeon E7-8880 V4 22-Core Processor
SKU: 816645-L21
Price: $8,201.46
834500-L21 - HP 2.20GHz 9.6GT/s QPI 55MB Cache Socket FCLGA2011 Intel Xeon E7-8880 V4 22-Core Processor
SKU: 834500-L21
Price: $7,455.87
834500-B21 - HP 2.20GHz 9.6GT/s QPI 55MB Cache Socket FCLGA2011 Intel Xeon E7-8880 V4 22-Core Processor
SKU: 834500-B21
Price: $8,201.46
845010-001 - HP 2.20GHz 9.6GT/s 55MB L3 Cache Socket FCLGA2011 Intel Xeon E7-8880 v4 22-Core Processor
SKU: 845010-001
Price: $9,232.72
788319-L21 - HP 2.30GHz 9.6GT/s QPI 45MB Last Level Cache Socket FCLGA2011 Intel Xeon E7-8880 v3 18-Core Processor
SKU: 788319-L21
Price: $96.84
788367-001 - HP 2.30GHz 9.6GT/s QPI 45MB Last Level Cache Socket FCLGA2011 Intel Xeon E7-8880 V3 18-Core Processor
SKU: 788367-001
Price: $4,976.25
831507-001 - HP 2.30GHz 9.60GT/s QPI 45MB Last Level Cache Socket FCLGA2011 Intel Xeon E7-8880 v3 18 Core Processor
SKU: 831507-001
Price: $5,366.22
835618-001 - HP 2.2GHz 9.60GT/s QPI 55MB L3 Cache Socket LGA2011-3 Intel Xeon E5-2699-v4 22-Core Processor
SKU: 835618-001
Price: $131.58
819856-B21 - HP 2.20GHz 9.60GT/s QPI 55MB Smart Cache Socket FCLGA2011-3 Intel Xeon E5-2699 V4 22 Core Processor for BL460 G9
SKU: 819856-B21
Price: $261.05
817967-L21 - HP 2.20GHz 9.60GT/s QPI 55MB Smart Cache Socket FCLGA2011-3 Intel Xeon E5-2699 V4 22 Core Processor for DL380 G9
SKU: 817967-L21
Price: $261.05
817967-B21 - HP 2.20GHz 9.60GT/s QPI 55MB L3 Cache Socket LGA2011-3 Intel Xeon E5-2699-v4 22-Core Processor
SKU: 817967-B21
Price: $271.58
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.