Alternative to 21P3735: Better-Value Equivalents in Stock
Comparing the 21P3735 (21P3735 - IBM RAID Controller Ultra2 with Battery and Cache 3.3v PCI) against alternatives? Pro Disk Network stocks 12 similar IBM 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 21P3735
| SKU | 21P3735 |
|---|---|
| Product | 21P3735 - IBM RAID Controller Ultra2 with Battery and Cache 3.3v PCI |
| Current price | $155.64 |
| Stock status | In Stock |
| Detail page | View 21P3735 › |
Alternatives to 21P3735
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.
39R8794 - IBM ServeRAID 6i+ Zero Channel Ultra320 SCSI RAID Controller - PCI-X - RAID Supported - 1 5 10 50 1E 1E0 00 5EE RAID Level - 128 MB
SKU: 39R8794
Price: $318.32
04N2261 - IBM Ultra-2 PCI Express 26MB Cache RAID Controller with Battery for AS/400 iSeries Server
SKU: 04N2261
Price: $147.37
34L3819 - IBM SSA 4-Port RAID Controller PCI Advance Serial RAID with 64MB for RS/6000
SKU: 34L3819
Price: $107.54
46M0830 - IBM ServeRAID M5025 8-port SAS RAID Controller - Serial Attached SCSI (SAS) Serial ATA/600 - PCI Express 2.0 x8 - Plug-in Card - RAID Suppo
SKU: 46M0830
Price: $732.43
39J5554 - IBM RAID Controller Cache Battery for IBM 2780, 5580, 5708, 5780
SKU: 39J5554
Price: $344.33
97P4846 - IBM RAID Controller Cache Battery for IBM 2780, 5580, 5708, 5780
SKU: 97P4846
Price: $344.33
46M0851 - IBM ServeRAID M5015 PCI-Express 2.0 X8 SAS SATA RAID Controller with Battery
SKU: 46M0851
Price: $96.84
49Y3719 - IBM ServeRAID M5015 PCI-Express 2.0 X8 SAS/SATA RAID Controller with Battery
SKU: 49Y3719
Price: $212.63
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.