Replacement for 766491-B21: Drop-In Alternatives We Stock
Looking for a replacement for the 766491-B21 (766491-B21 - HP FlexFabric 2-Port 10GB 536FLB FlexibleLOM Network Adapter)? 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 766491-B21
| SKU | 766491-B21 |
|---|---|
| Product | 766491-B21 - HP FlexFabric 2-Port 10GB 536FLB FlexibleLOM Network Adapter |
| Current price | $113.68 |
| Stock status | In Stock |
| Detail page | View 766491-B21 › |
Drop-in replacements for 766491-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.
700066-B21 - HP FlexFabric 20GB 2-Ports 630FLB PCI-Express X8 FlexibleLOM Network Adapter
SKU: 700066-B21
Price: $307.59
HPE P16818-B21 FlexibleLOM 560FLB 2-Port 10Gb/s Gigabit Ethernet Adapter for ProLiant BL460c Gen9
SKU: P16818-B21
Price: $145.26
HPE P16812-B21 FlexibleLOM 560FLB 2-Port 10Gb/s Gigabit Ethernet Adapter for ProLiant BL460c Gen9
SKU: P16812-B21
Price: $184.21
580151-001 - HP Nc551m Dual Port FlexFabric 10GB Converged Network Adapter Network Adapter PCI-Express 2.0 X8 2 Ports
SKU: 580151-001
Price: $103.62
HPE 817747-001 FlexibleLOM 640FLR-SFP28 Dual-Port 10/25Gb PCI-e Gen3 x4 Ethernet Network Adapter for ProLiant Server
SKU: 817747-001
Price: $50.53
HPE 840139-001 FlexibleLOM 640FLR-SFP28 Dual-Port 10/25Gb PCI-e Gen3 x4 Ethernet Network Adapter for ProLiant Server
SKU: 840139-001
Price: $145.26
HPE 817762-B21 HP 817762-B21 FlexibleLOM 620QSFP28 1 x Port 100Gbps PCI Express 3.0 x8 Network Adapter
SKU: 817762-B21
Price: $205.26
647588-001 - HP FlexFabric 10GB 554M Adapter - Network Adapter - 2-Ports
SKU: 647588-001
Price: $205.26
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.