Guaranteed compatible upgrades for:

IBM/Lenovo ThinkCentre M55 8807, 8808, 8812, 8813-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:

4GB

Expansion:

2 Sockets

Standard Memory:

256MB (Removable) or
512MB (Removable) or
1GB (Removable) or
2GB (Removable)

CPU/Chipset:

Intel Celeron D Intel Q963
Intel Pentium D Intel Q963
Intel Core 2 Duo Intel Q963

Bus Architecture:

PCI; PCI Express

Mfr's System P/N's:

8807-xxx; 8808-xxx

Upgrade Path:

Virtually any configuration up to 4GB can be reached using any combination of 512MB, 1GB and 2GB modules.