Alternative to 540-5664: Better-Value Equivalents in Stock
Comparing the 540-5664 (540-5664 - Sun CPU / Memory Uniboard UltraSPARC S400 with 4 x 1.05GHz CPU without Memory for Fire E25K) against alternatives? Pro Disk Network stocks 12 similar 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 540-5664
| SKU | 540-5664 |
|---|---|
| Product | 540-5664 - Sun CPU / Memory Uniboard UltraSPARC S400 with 4 x 1.05GHz CPU without Memory for Fire E25K |
| Current price | $265.26 |
| Stock status | In Stock |
| Detail page | View 540-5664 › |
Alternatives to 540-5664
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.
540-6085 - Sun CPU/Memory UniBoard with 4 x 900MHz UltraSPARC III Processor for Fire V1280
SKU: 540-6085
Price: $392.34
540-5981 - Sun CPU / Memory Uniboard with 4 x 1200MHz UltraSPARC III Processor for Fire E2900 / Netra 1280
SKU: 540-5981
Price: $2,148.38
X4007A - Sun 4 UltraSPARC III Cu 900MHz CPU / Memory Uniboard for Fire 3800 / 4800
SKU: X4007A
Price: $329.04
X4005A - Sun Fire CPU/Memory Uniboard with 4 UltraSPARC III 750MHz Processor
SKU: X4005A
Price: $619.67
540-6079 - Sun CPU/Memory System Board 4 x 900MHz UltraSPARC III for Fire 12K
SKU: 540-6079
Price: $194.74
540-4990 - Sun CPU/Memory System Board 4x 900MHz UltraSPARC III for Fire 12K
SKU: 540-4990
Price: $273.68
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.