Replacement for 643757-L21: Drop-In Alternatives We Stock
Looking for a replacement for the 643757-L21 (643757-L21 - HP 2GHz 5.86GT/s QPI 18MB L3 Cache Socket LGA1567 Intel Xeon E7-2820 8-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 643757-L21
| SKU | 643757-L21 |
|---|---|
| Product | 643757-L21 - HP 2GHz 5.86GT/s QPI 18MB L3 Cache Socket LGA1567 Intel Xeon E7-2820 8-Core Processor |
| Current price | $646.55 |
| Stock status | In Stock |
| Detail page | View 643757-L21 › |
Drop-in replacements for 643757-L21
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.
643757-B21 - HP 2GHz 5.86GT/s QPI 18MB L3 Cache Socket LGA1567 Intel Xeon E7-2820 8-Core Processor for ProLiant BL620c G7 Server
SKU: 643757-B21
Price: $2,821.64
650018-001 - HP 2GHz 5.86GT/s QPI 18MB L3 Cache Socket LGA1567 Intel Xeon E7-2820 8-Core Processor for ProLiant G7 Servers
SKU: 650018-001
Price: $1,495.41
597899-001 - HP 2.0GHz 6.40GT/s QPI 18MB L3 Cache Socket LGA1567 Intel Xeon X6550 Octa-core (8 Core) Processor
SKU: 597899-001
Price: $71.58
594897-001 - HP 2.0GHz 6.40GT/s QPI 18MB L3 Cache Socket LGA1567 Intel Xeon E7540 Hexa-core (6 Core) Processor for ProLiant Servers
SKU: 594897-001
Price: $71.58
594894-001 - HP 2.0GHz 6.40GT/s QPI 18MB L3 Cache Socket LGA1567 Intel Xeon X7550 Octa-core (8 Core) Processor
SKU: 594894-001
Price: $71.58
594896-001 - HP 2.0GHz 6.40GT/s QPI 18MB L3 Cache Socket LGA1567 Intel Xeon X6550 Octa-core (8 Core) Processor for ProLiant Servers
SKU: 594896-001
Price: $73.68
579277-001 - HP 1.87GHz 4.8GT/s QPI 18MB L3 Cache Socket FCLGA1567 Intel Xeon E7520 4-Core Processor
SKU: 579277-001
Price: $73.68
597821-001 - HP 1.86GHz 4.80GT/s QPI 18MB L3 Cache Socket LGA1567 Intel Xeon E7520 Quad-Core Processor for ProLiant Servers
SKU: 597821-001
Price: $73.68
589082-L21 - HP 2.0GHz 6.40GT/s QPI 18MB L3 Cache Socket LGA1567 Intel Xeon X6550 Octa-core (8 Core) Processor for ProLiant BL620C G7 Server
SKU: 589082-L21
Price: $73.68
643075RB21 - HP 2GHz 5.86GT/s QPI 18MB L3 Cache Socket LGA1567 Intel Xeon E7-4820 8-Core Processor
SKU: 643075RB21
Price: $73.95
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.