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RamCity guarantees 100% that all modules below are compatible with the IBM/Lenovo SurePOS 500/600 Series 4840-5x3, 6x3

Part #. ACI • DDR-266 / PC2100 • CL2.5 • 2.5V • 16-chip 64Mx8 • more info

Buy new: $115.99 $90.99

Part #. KTM3304/1G • DDR-266 / PC2100 • 2.5V • more info

Buy new: $172.99 $134.99

Part #. ACS • DDR-266 / PC2100 • CL2.5 • 2.5V • 16-chip 32Mx8 • more info

Buy new: $87.99 $68.99

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:

Maximum Memory:

Expansion:

CPU/Chipset:

Bus Architecture:

Mfr's System P/N's:

Upgrade Path:

Virtually any configuration up to 2GB can be reached using any combination of 512MB and 1GB.