Guaranteed compatible upgrades for:

IBM/Lenovo ThinkCentre M55 8810, 8811, 8814, 8816-xxx

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WD Black 4TB 7200RPM 128MB Cache SATA 6.0Gb/s 3.5" Desktop Internal Hard Drive

WD Black 4TB 7200RPM 128MB Cache SATA 6.0Gb/s 3.5" Desktop Internal Hard Drive

Hynix 2GB (1x 2GB) DDR2-800 PC2-6400 1.8V DR x8 240-pin UDIMM RAM Module

Hynix 2GB (1x 2GB) DDR2-800 PC2-6400 1.8V DR x8 240-pin UDIMM RAM Module

System Specifications

Maximum Memory:

8GB

Expansion:

4 Sockets

Standard Memory:

256MB (Removable) or
512MB (Removable) or
1GB (Removable)

Bus Architecture:

PCI Express; PCI-X

Mfr's System P/N's:

8810-xxx; 8811-xxx; 8814-xxx; 8816-xxx

Upgrade Path:

Virtually any configuration up to 8GB can be reached using any combination of 512MB, 1GB and 2GB modules.