Alternative to 390390-B21: Better-Value Equivalents in Stock
Comparing the 390390-B21 (390390-B21 - HP ProLiant Second Serial Port Option Kit) against alternatives? Pro Disk Network stocks 12 similar HP parts that offer comparable performance at different price points. Each option below is in-stock, US-warehoused, and tested-and-certified before ship. Bulk pricing is available on quantities of 5+; B2B procurement can use Net 30 with PO.
About the 390390-B21
| SKU | 390390-B21 |
|---|---|
| Product | 390390-B21 - HP ProLiant Second Serial Port Option Kit |
| Stock status | In Stock |
| Detail page | View 390390-B21 › |
Alternatives to 390390-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.
391183-001 - HP Second Serial Port Option Kit for ProLiant ML310 G4 Server
SKU: 391183-001
Price: $232.82
3TK82AA - HP Serial Port (600/705/800) Serial for Computer, Notebook 1 x DB-9 Male Serial 1 x Serial Header
SKU: 3tk82aa
Price: $143.39
372657-001 - HP Second Serial Port Connector Assembly for ProLiant ML350 G4 Server
SKU: 372657-001
Price: $184.21
383033-001 - HP / Compaq Second Serial Port Connector Cable for dc7100 Desktop
SKU: 383033-001
Price: $71.58
514206-B21 - HP Dedicated iLO Management Port Option Kit for ProLiant DL320/ML330 G6 Server
SKU: 514206-B21
Price: $145.26
575498-B21 - HP Dedicated Management Port Option Kit Module for ProLiant DL170h G6 Server
SKU: 575498-B21
Price: $170.53
701491-001 - HP 2U Second PE3 (x32) Graphics Processing Unit (GPU) Board for ProLiant SL250S
SKU: 701491-001
Price: $110.53
440936-B21 - HP 2p AMD Opteron 8218 2.6GHz 2MB L2 Cache Socket-F (1207) Second Generation Processor for Proliant Servers
SKU: 440936-B21
Price: $160.00
408667-B21 - HP ProLiant BL45p G2 AMD Second-Generation Opteron 8214 2.2GHz CPU Blade Server
SKU: 408667-B21
Price: $3,569.50
How we pick alternatives
Every recommendation above was selected using these criteria:
- Spec parity — capacity, speed, port count, and form factor matched within a 10% tolerance
- Price spread — alternatives shown across the price range, so you can pick on budget
- Brand mix — both OEM-equivalent and trusted aftermarket, all certified
- Reliability data — preferred parts have failure rates below 1% in our 18-month return tracking
- In stock today — shipping today, not 4-6 weeks from now
Want a side-by-side spec comparison?
We can prepare a written comparison covering throughput, power draw, form factor and validated compatibility. Email sales@prodisknetwork.com or call +1 (407) 205-8454 — most quotes ship within 4 business hours.