Replacement for 21-43918-44: Drop-In Alternatives We Stock
Looking for a replacement for the 21-43918-44 (21-43918-44 - HP 500MHz Processer Controller Unit for AlphaServer 800)? 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 21-43918-44
| SKU | 21-43918-44 |
|---|---|
| Product | 21-43918-44 - HP 500MHz Processer Controller Unit for AlphaServer 800 |
| Current price | $602.78 |
| Stock status | In Stock |
| Detail page | View 21-43918-44 › |
Drop-in replacements for 21-43918-44
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.
726737-B21 - HP Smart Array P440ar Dual Port PCI-Express 3 x8 12GB/s SAS Mezzanine Storage Controller Card with 2GB Flash Back Write Cache
SKU: 726737-B21
Price: $47.37
804424-B21 - HP Smart Array P204i-C SR Gen10 Storage Controller (RAID) SATA 6Gb/s / SAS 12Gb/s PCI-E 3.0 x8
SKU: 804424-B21
Price: $47.37
447774-B21 - HP SC40GE 4-Port PCI-Express SAS Storage Controller External Host Bus Adapter
SKU: 447774-B21
Price: $96.84
820834-B21 - HP Smart Array P440 / 2GB FBWC 12GB 1-Port INT SAS Controller
SKU: 820834-B21
Price: $128.42
416096-B21 - HP SC44Ge 8-Channel (4-Internal/4-External) PCI-Express SAS Storage Controller Host Bus Adapter
SKU: 416096-B21
Price: $145.26
761871-B21 - HP Smart Array P244br 12GB 2-Port PCi-Express x8 SAS RAID Controller includes 1GB GBWC
SKU: 761871-B21
Price: $145.26
726736-B21 - HP Smart Array P440ar Dual Port PCI-Express 3 x8 12GB/s SAS Mezzanine Storage Controller Card with 2GB Flash Back Write Cache
SKU: 726736-B21
Price: $163.16
726821-B21 - HP Smart Array P440 PCI-Express 3.0 X8 12GB 1-Port Internal SAS Controller with 4GB Fbwc
SKU: 726821-B21
Price: $163.16
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.