Guaranteed compatible upgrades for:

IBM/Lenovo ThinkCentre A55 8982, 8994-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

System Specifications

Maximum Memory:

2GB

Expansion:

2 Sockets

Standard Memory:

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

CPU/Chipset:

Intel Pentium 4 Intel 946GZ
Intel Celeron D Intel 946GZ
Intel Pentium D Intel 946GZ

Bus Architecture:

PCI; PCI Express

Mfr's System P/N's:

8982-xxx; 8994-xxx

Upgrade Path:

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