Replacement for 257456-B21: Drop-In Alternatives We Stock
Looking for a replacement for the 257456-B21 (257456-B21 - Compaq 2.0GHz 400MHz FSB 512KB L2 Cache Socket PPGA603 / PPGA604 Intel Xeon 1-Core Processor)? Pro Disk Network ships Intel 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 257456-B21
| SKU | 257456-B21 |
|---|---|
| Product | 257456-B21 - Compaq 2.0GHz 400MHz FSB 512KB L2 Cache Socket PPGA603 / PPGA604 Intel Xeon 1-Core Processor |
| Current price | $136.76 |
| Stock status | In Stock |
| Detail page | View 257456-B21 › |
Drop-in replacements for 257456-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.
277602-B21 - Compaq 1.80GHz 400MHz FSB 512KB L2 Cache Socket PPGA603 Intel Xeon 1-Core Processor
SKU: 277602-B21
Price: $73.76
278544-001 - Compaq 2.0GHz 400MHz FSB 512KB L2 Cache Socket PPGA603 / PPGA604 Intel Xeon 1-Core Processor
SKU: 278544-001
Price: $82.42
261668-005 - Compaq 2.6GHz 400MHz FSB 512KB L2 Cache Socket PPGA603 Intel Xeon 1-Core Processor
SKU: 261668-005
Price: $82.42
239061-001 - Compaq 1.50GHz 400MHz FSB 1MB L2 Cache Socket PPGA603 Intel Xeon 1-Core Processor
SKU: 239061-001
Price: $82.42
239060-001 - Compaq 1.40GHz 400MHz FSB 512KB L2 Cache Socket PPGA603 Intel Xeon 1-Core Processor
SKU: 239060-001
Price: $82.42
238843-B21 - Compaq 1.40GHz 400MHz FSB 512KB L2 Cache Socket PPGA603 Intel Xeon 1-Core Processor
SKU: 238843-B21
Price: $82.42
283991-004 - Compaq 2.0GHz 400MHz FSB 1MB L2 Cache Socket PPGA603 Intel Xeon 1-Core Processor
SKU: 283991-004
Price: $82.42
284168-005 - Compaq 2.20GHz 400MHz FSB 2MB L2 Cache Socket PPGA603 Intel Xeon 1-Core Processor
SKU: 284168-005
Price: $82.42
314225-001 - Compaq 400MHz 100MHz FSB 512KB L2 Cache Socket SC330 Intel Pentium II Xeon 1-Core Processor
SKU: 314225-001
Price: $82.42
278545-001 - Compaq 2.20GHz 400MHz FSB 2MB L2 Cache Socket PPGA603 Intel Xeon 1-Core Processor
SKU: 278545-001
Price: $82.42
278554-001 - Compaq 2.0GHz 400MHz FSB 512KB L2 Cache Socket PPGA603 / PPGA604 Intel Xeon 1-Core Processor
SKU: 278554-001
Price: $82.42
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.