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System Board Option # Manufacturing Part # Description Previous Part # 540-7992[F] 0MB 8-Core 1.2GHz System Board with Tray 371-3640 Mounting Tray 511-1087 8-Core 1.2GHz System Board 371-2210[C] CR2032 3V Battery 540-7994[F] 0MB 4-Core 1.2GHz System Board with Tray 371-3640 Mounting Tray 511-1200 4-Core 1.2GHz System Board 371-2210[C] CR2032 3V Battery 541-2814 [F] 0MB 8-Core 1.2GHz System Board with Tray 371-3640 Mounting Tray 501-7781 8-Core 1.2GHz System Board 371-2210[C] CR2032 3V Battery 541-2814-05[F] 0MB 8-Core 1.2GHz System Board with Tray 371-3640 Mounting Tray 511-1087 8-Core 1.2GHz System Board 371-2210[C] CR2032 3V Battery