Replacement for 581870-B21: Drop-In Alternatives We Stock
Looking for a replacement for the 581870-B21 (581870-B21 - HP 2.66GHz 2.5GT/s DMI 8MB SmartCache Socket LGA1156 Intel Xeon X3450 4-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 581870-B21
| SKU | 581870-B21 |
|---|---|
| Product | 581870-B21 - HP 2.66GHz 2.5GT/s DMI 8MB SmartCache Socket LGA1156 Intel Xeon X3450 4-Core Processor |
| Current price | $123.66 |
| Stock status | In Stock |
| Detail page | View 581870-B21 › |
Drop-in replacements for 581870-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.
581870-L21 - HP 2.66GHz 2.5GT/s DMI 8MB SmartCache Socket LGA1156 Intel Xeon X3450 4-Core Processor
SKU: 581870-L21
Price: $465.88
590324-001 - HP 2.66GHz 2.5GT/s DMI 8MB SmartCache Socket LGA1156 Intel Xeon X3450 4-Core Processor
SKU: 590324-001
Price: $85.82
578471-L21 - HP 2.53GHz 2.5GT/s DMI 8MB SmartCache Socket LGA1156 Intel Xeon 4-Core Processor
SKU: 578471-L21
Price: $96.84
604627-001 - HP 2.80GHz 2.5GT/s DMI 8MB SmartCache Socket LGA1156 Intel Xeon X3460 4-Core Processor
SKU: 604627-001
Price: $99.32
578379-002 - HP 2.80GHz 2.5GT/s DMI 8MB SmartCache Socket LGA1156 Intel Xeon X3460 4-Core Processor
SKU: 578379-002
Price: $99.32
578473-B21 - HP 2.80GHz 2.5GT/s DMI 8MB SmartCache Socket LGA1156 Intel Xeon X3460 4-Core Processor
SKU: 578473-B21
Price: $103.47
578348-L21 - HP 2.80GHz 2.5GT/s DMI 8MB SmartCache Socket LGA1156 Intel Xeon X3460 4-Core Processor
SKU: 578348-L21
Price: $103.47
578348-B21 - HP 2.80GHz 2.5GT/s DMI 8MB SmartCache Socket LGA1156 Intel Xeon X3460 4-Core Processor
SKU: 578348-B21
Price: $103.47
727377-001 - HP 3.40GHz 5GT/s DMI 8MB SmartCache Socket FCLGA1150 Intel Xeon E3-1245 v3 Quad Core Processor
SKU: 727377-001
Price: $110.53
578379-003 - HP 2.66GHz 2.5GT/s DMI 8MB SmartCache Socket LGA1156 Intel Xeon X3450 4-Core Processor
SKU: 578379-003
Price: $112.41
578347-L21 - HP 2.66GHz 2.5GT/s DMI 8MB SmartCache Socket LGA1156 Intel Xeon X3450 4-Core Processor
SKU: 578347-L21
Price: $123.66
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.