Replacement for 656590-B21: Drop-In Alternatives We Stock
Looking for a replacement for the 656590-B21 (656590-B21 - HP Flex-10 10GbE 2-Port 530FLB Adapter 2 x Network (RJ-45))? 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 656590-B21
| SKU | 656590-B21 |
|---|---|
| Product | 656590-B21 - HP Flex-10 10GbE 2-Port 530FLB Adapter 2 x Network (RJ-45) |
| Current price | $594.74 |
| Stock status | In Stock |
| Detail page | View 656590-B21 › |
Drop-in replacements for 656590-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.
586445-001 - HP NC550M PCI-Express x8 2-Port Flex-10 10GbE Gigabit Ethernet Server Adapter for HP ProLiant c-Class BladeSystem
SKU: 586445-001
Price: $163.16
HP 454522-001 NC522M Flex-10 2 x Ports 10GbE Multifunction Mezzinine Ethernet Adapter Network Interface Card
SKU: 454522-001
Price: $187.37
HPE JH148-61101 Flex Network 5510 Series 5510 48G PoE+ 4SFP+ 48 x RJ-45 Ports PoE+ 10/100/1000Base-T + 4 x SFP+ Ports Layer 3 Managed Rack-mountable Gigabit Ethernet Network Switch
SKU: JH148-61101
Price: $538.95
HPE JG894-61101 HP JG894-61101 Flex Fabric 5700-48G-4XG-2QSFP+ 48 x RJ-45 Ports 10/100/1000Base-T + 4 x SFP+ Ports + 2 x QSFP+ Ports Layer 2 Managed Rack-mountable Gigabit Ethernet Network Switch
SKU: JG894-61101
Price: $247.37
455882-001 - HP Virtual Connect Flex-10 10GB Ethernet Module for C-class Bladesystem
SKU: 455882-001
Price: $357.89
HPE P71679-005 ProLiant DL380 Gen11 1x Xeon Silver 4510 12-Core 2.40GHz 2x 32GB DDR5 2x 480GB SATA SSD 8-Bays BC SFF MR408i-o Controller 2x 1000W Flex Slot PSU 2U Rack-mountable Smart Choice Server
SKU: P71679-005
Price: $13,166.32
HPE P71680-005 ProLiant DL380 Gen11 1x Xeon Silver 4509Y 8-Core 2.60GHz 2x 32GB DDR5 2x 480GB SATA SSD 8-Bays SFF MR408i-o Controller 2x 1000W Flex Slot RPS PSU 2U Rack-mountable Smart Choice Server
SKU: P71680-005
Price: $13,608.42
HPE P71686-005 ProLiant DL360 Gen11 1x Xeon Silver 4510 12-Core 2.40GHz 2x 32GB DDR5 2x 480GB SATA SSD 8-Bays SFF MR408i-o Controller 2x 1000W Flex Slot PSU 1U Rack-mountable Smart Choice Server
SKU: P71686-005
Price: $13,661.05
HPE P72985-005 ProLiant DL360 Gen11 1x Xeon Silver 4514Y 16-Core 2.00GHz 4x 32GB DDR5 2x 1.2TB SAS HDD 8-Bays SFF MR408i-o Controller 2x 1000W Flex Slot PSU 1U Rack-mountable Smart Choice Server
SKU: P72985-005
Price: $16,113.68
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.