Alternative to AB556A: Better-Value Equivalents in Stock
Comparing the AB556A (AB556A - HP 4GB DDR2-533MHz PC2-4200 ECC Registered CL4 240-Pin DIMM 1.8V Single Rank Memory Module) 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 AB556A
| SKU | AB556A |
|---|---|
| Product | AB556A - HP 4GB DDR2-533MHz PC2-4200 ECC Registered CL4 240-Pin DIMM 1.8V Single Rank Memory Module |
| Current price | $163.22 |
| Stock status | In Stock |
| Detail page | View AB556A › |
Alternatives to AB556A
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.
AB454A - HP 4GB Kit (2 X 2GB) DDR2-533MHz PC2-4200 ECC Registered CL4 240-Pin DIMM 1.8V Memory
SKU: ab454a
Price: $71.58
A9849-60301 - HP 4GB DDR2-533MHz PC2-4200 ECC Registered CL4 240-Pin DIMM 1.8V Dual Rank Memory Module
SKU: A9849-60301
Price: $73.68
AD344A - HP 4GB Kit (2 X 2GB) DDR2-533MHz PC2-4200 ECC Registered CL4 240-Pin DIMM 1.8V Dual Rank Memory
SKU: AD344A
Price: $128.42
AB566AX - HP 4GB DDR2-533MHz PC2-4200 ECC Registered CL4 240-Pin DIMM Single Rank Memory Module
SKU: AB566AX
Price: $128.42
AD275A - HP 4GB Kit (2 X 2GB) DDR2-533MHz PC2-4200 ECC Registered CL4 240-Pin DIMM 1.8V Dual Rank Memory
SKU: AD275A
Price: $128.42
AB564A - HP 4GB Kit (4 X 1GB) DDR2-533MHz PC2-4200 ECC Registered CL4 240-Pin DIMM 1.8V Memory
SKU: AB564A
Price: $128.42
AB561-60001 - HP 4GB DDR2-533MHz PC2-4200 ECC Registered CL4 240-Pin DIMM Dual Rank Memory Module
SKU: AB561-60001
Price: $144.01
RP907A - HP 4GB DDR2-533MHz PC2-4200 ECC Registered CL4 240-Pin DIMM 1.8V Memory Module
SKU: RP907A
Price: $144.01
RP907AA - HP 4GB DDR2-533MHz PC2-4200 ECC Registered CL4 240-Pin DIMM 1.8V Memory Module
SKU: RP907AA
Price: $144.01
AB455A - HP 8GB Kit (2 X 4GB) DDR2-533MHz PC2-4200 ECC Registered CL4 240-Pin DIMM 1.8V Dual Rank Memory
SKU: AB455A
Price: $147.37
A9849-69001 - HP 4GB DDR2-533MHz PC2-4200 ECC Registered CL4 240-Pin DIMM 1.8V Dual Rank Memory Module
SKU: A9849-69001
Price: $163.22
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.