Alternative to 251998-B21: Better-Value Equivalents in Stock
Comparing the 251998-B21 (251998-B21 - Compaq 512MB DDR-266MHz PC2100 non-ECC Unbuffered CL2.5 184-Pin DIMM Memory Module) 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 251998-B21
| SKU | 251998-B21 |
|---|---|
| Product | 251998-B21 - Compaq 512MB DDR-266MHz PC2100 non-ECC Unbuffered CL2.5 184-Pin DIMM Memory Module |
| Current price | $173.28 |
| Stock status | In Stock |
| Detail page | View 251998-B21 › |
Alternatives to 251998-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.
267907-B22 - Compaq 512MB DDR-266MHz PC2100 ECC Unbuffered CL2.5 184-Pin DIMM Memory Module
SKU: 267907-B22
Price: $109.28
175925-882 - Compaq 512MB DDR-266MHz PC2100 non-ECC Unbuffered CL2.5 184-Pin DIMM Dual Rank Memory Module
SKU: 175925-882
Price: $173.28
306984-001 - Compaq 512MB DDR-266MHz PC2100 non-ECC Unbuffered CL2.5 184-Pin DIMM Memory Module for Desktop PCs
SKU: 306984-001
Price: $173.28
285650-001 - Compaq 512MB DDR-266MHz PC2100 non-ECC Unbuffered CL2.5 184-Pin DIMM Memory Module for EVO D500 / D510c / D310 / D315 / Evo W4000
SKU: 285650-001
Price: $173.28
251584-041 - Compaq 512MB DDR-266MHz PC2100 ECC Registered CL2.5 184-Pin DIMM Memory Module
SKU: 251584-041
Price: $103.26
260655-002 - Compaq 512MB DDR-266MHz PC2100 ECC Registered CL2.5 184-Pin DIMM Memory Module
SKU: 260655-002
Price: $103.26
257973-B21 - Compaq 512MB Kit (2 X 256MB) DDR-266MHz PC2100 ECC Registered CL2.5 184-Pin DIMM Memory
SKU: 257973-B21
Price: $173.68
257974-B21 - Compaq 1GB Kit (2 X 512MB) DDR-266MHz PC2100 ECC Registered CL2.5 184-Pin DIMM Memory for ProLiant Servers
SKU: 257974-B21
Price: $236.21
282436-B22 - Compaq 1GB DDR-266MHz PC2100 non-ECC Unbuffered CL2.5 184-Pin DIMM Memory Module
SKU: 282436-B22
Price: $94.88
267905-B21 - Compaq 128MB DDR-266MHz PC2100 ECC Unbuffered CL2.5 184-Pin DIMM Memory Module for W4000 Workstation
SKU: 267905-B21
Price: $98.05
175923-001 - Compaq 128MB DDR-266MHz PC2100 non-ECC Unbuffered CL2.5 184-Pin DIMM Memory
SKU: 175923-001
Price: $98.05
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.