Replacement for 779243-B21: Drop-In Alternatives We Stock
Looking for a replacement for the 779243-B21 (HPE 779243-B21 Connectx-3 Pro 2P 40GbE 544+A8L Ib/ 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 779243-B21
| SKU | 779243-B21 |
|---|---|
| Product | HPE 779243-B21 Connectx-3 Pro 2P 40GbE 544+A8L Ib/ Network Adapter |
| Current price | $421.05 |
| Stock status | In Stock |
| Detail page | View 779243-B21 › |
Drop-in replacements for 779243-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.
HP 868089-001 HPE 868089-001 Mellanox MCX4421A-ACAN ConnectX-4 Lx EN 25GbE PCI-Express Network Adapter
SKU: 868089-001
Price: $117.89
HPE 872467-001 Connectx-4 Lx EN 2-Ports 25Gb/s PCI-Express 3.0 x8 Network Adapter
SKU: 872467-001
Price: $117.89
HPE 874251-001 Connectx-5 2-Port 100Gb/s 100GBase-X QSFP28 PCI Express 3.0 x16 Network Adapter
SKU: 874251-001
Price: $145.26
HPE 870823-001 Connectx-4 2-Ports 25Gb/s 25GBase-X SFP28 25 Gigabit Ethernet Network Adapter
SKU: 870823-001
Price: $149.47
HPE P05954-B21 Connectx-4 843QSFP28 2 x Ports QSFP28 100Gb/s PCI Express 3.0 x16 Network Adapter
SKU: P05954-B21
Price: $334.74
HPE P05953-B21 Connectx-4 2-Ports 100Gb/s 100GBase-X QSFP28 PCI Express 3.0 x16 Network Adapter
SKU: P05953-B21
Price: $334.74
HPE P37690-B21 ConnectX-5 VPI CX555A 2-Port 100Gb/s QSFP28 PCIe 3.0 x16 Network Adapter
SKU: P37690-B21
Price: $447.37
HPE P23828-001 Mellanox Connectx-5 1-Port 100Gb/s QSFP28 PCI Express Gen3 x8 Adapter
SKU: P23828-001
Price: $163.16
HPE P02186-001 ConnectX-4 2-Ports 50Gb/s 50GBase-X QSFP28 PCI Express 3.0 x8 Plug-in Card Network Interface Card
SKU: P02186-001
Price: $650.53
666170-B21 - HP 1-Port 10GBe NIC PCI-Express G2 Mellanox ConnectX-2 Network Adapter
SKU: 666170-B21
Price: $182.37
NVIDIA MCX755106AC-HEAT ConnectX-7 2-Ports 200Gb/s QSFP112 PCI Express 5.0 x16 Plug-in Card Network Adapter (HP-labeled)
SKU: MCX755106AC-HEAT
Price: $2,444.21
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.