Replacement for 377520-B21: Drop-In Alternatives We Stock
Looking for a replacement for the 377520-B21 (377520-B21 - HP Hot plug 64-bit/133 PCI-X Mezzanine Kit 2 x PCI-X 133MHz)? 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 377520-B21
| SKU | 377520-B21 |
|---|---|
| Product | 377520-B21 - HP Hot plug 64-bit/133 PCI-X Mezzanine Kit 2 x PCI-X 133MHz |
| Stock status | In Stock |
| Detail page | View 377520-B21 › |
Drop-in replacements for 377520-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.
376472-001 - HP PCI-X Hot-Pluggable Mezzanine Circuit Board for ProLiant DL580 G3
SKU: 376472-001
Price: $1,197.89
764976-001 - HP 64GB iSolid State Drive Mezzanine Kit for ProLiant m700 Server Cartridge
SKU: 764976-001
Price: $861.12
756106-001 - HP 64GB iSolid State Drive Mezzanine Kit for ProLiant m700 Server Cartridge
SKU: 756106-001
Price: $900.70
764735-001 - HP InfiniBand 544+M FDR 10 / 40Gbps Dual Port PCI-Express 3.0 Mezzanine Network Adapter
SKU: 764735-001
Price: $96.84
764614-001 - HP InfiniBand 544+M 10Gbps Dual Port PCI-Express 3.0 Mezzanine Network Adapter
SKU: 764614-001
Price: $96.84
HP 448066-001 NC364M 4 x Ports 1GbE PCI-Express Fibre Channel Mezzanine Adapter Network Interface Card for c-Class BladeSystem
SKU: 448066-001
Price: $155.79
647590-B21 - HP FlexFabric 554M Dual Port 10Gb/s PCI Express 2.0 x8 Mezzanine Network Adapter
SKU: 647590-B21
Price: $187.37
644161-B21 - HP Infiniband PCI-Express Blade Mezzanine Host Channel Adapter
SKU: 644161-B21
Price: $191.58
764734-001 - HP InfiniBand 544+M QDR 10GB/s Dual Port PCI-Express 3.0 Mezzanine Network Adapter
SKU: 764734-001
Price: $296.30
764612-001 - HP InfiniBand 544+M QDR 10GB/s Dual Port PCI-Express 3.0 Mezzanine Network Adapter
SKU: 764612-001
Price: $318.32
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.