Replacement for A5866-04002: Drop-In Alternatives We Stock
Looking for a replacement for the A5866-04002 (A5866-04002 - HP 550MHz Processor with Heat Sink for N4000 Server)? 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 A5866-04002
| SKU | A5866-04002 |
|---|---|
| Product | A5866-04002 - HP 550MHz Processor with Heat Sink for N4000 Server |
| Current price | $128.42 |
| Stock status | In Stock |
| Detail page | View A5866-04002 › |
Drop-in replacements for A5866-04002
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.
116313-001 - HP 550MHz 100MHz FSB 512KB L2 Cache Socket Slot 2 Intel Pentium III Xeon Processor with Heat Sink
SKU: 116313-001
Price: $97.14
A7158-04002 - HP 1.50GHz 400MHz FSB 6MB L3 Cache Socket PPGA611 Intel Itanium-2 Processor for Integrity rx4640 Server
SKU: A7158-04002
Price: $106.49
A6805-04002 - HP 750MHz 1.5MB Cache PA-RISC 8700 Processor for 9000 rp5470 / rp5430 Server
SKU: A6805-04002
Price: $147.86
166146-001 - HP 667MHz 133MHz FSB 256KB L2 Cache Socket SECC 2 Intel Pentium III Processor with Heat Sink for ProLiant ML350 G1 Server
SKU: 166146-001
Price: $97.14
A4883-69101 - HP Pa-risc 8500 360MHz Processor with 1.5MB Cache Includes Attached Heat Sink for 9000-N4000 Server
SKU: A4883-69101
Price: $182.93
A6443-69001 - HP PA-RISC 8700 650MHz Processor with 2.25MB Cache Includes Attached Heat Sink for 9000 rp7410 Server
SKU: A6443-69001
Price: $890.64
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.