PHS-memory RAM suitable for HP Pavilion 590-p0102nv

This 4GB memory is 100% compatible with HP Pavilion 590-p0102nv.
What to consider when upgrading RAM?The fast Dual Channel Mode operation is optimally supported when installing the memories in pairsIf you use a Core i5 or Core i7 processor, you can only use the UDIMM memoriesIf you use a Xeon processor, you can use ECC UDIMM memories or UDIMM memories without ECCThe ECC function is only supported if all the RAMs used are UDIMM ECC memories.