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RamCity guarantees 100% that all modules below are compatible with the HP/Compaq Pavilion a500 Series Desktop a530 (DDR)

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RamCity 512MB CL2.5 184-pin DIMM
Part #. ACS • DDR-266 / PC2100 • CL2.5 • 2.5V • 16-chip 32Mx8 •  more info
Buy new: $78.99 $61.99

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We guarantee your memory upgrade will be 100% compatible, or return it within 1 Whole Year for a full refund.
Need some help installing your upgrade? See our guides and videos.
System Specifications
Standard Memory:
  • 128MB (Removable) or
  • 256MB (Removable)
Maximum Memory:
  • 1GB
Expansion:
  • 2 Sockets
CPU/Chipset:
  • AMD Athlon XP 1600 MHz VIA Apollo KT266A (VT8366A)
Bus Architecture:
  • PCI
Mfr's System P/N's:
  • P6421A
Upgrade Path:
  • Virtually any configuration up to 1GB can be reached using 512MB modules.