85www.gateway.comMemoryMemoryYour server has four PCI ×16 connectors on the system board for memory boards. Eachmemory board has sockets for four DIMMs and supports two DDR2 channels (with twoDIMMs per channel). Memory boards support both single-rank and double-rank, registeredDIMMs. One to four memory boards can be installed.Installing and removing memory boardsMemory boards can be configured in either redundant or non-redundant configurations.Memory boards configured using RAID or mirroring are considered redundant. If a memoryor memory board fault occurs on a memory board that is redundantly configured, theboard containing the fault can be removed, and the board or DIMM replaced, while thesystem is on. Memory boards that are not redundantly configured (including boards thatare configured with spare memory) must not be removed while the system is on.The following memory board replacement options are available to this server:■ Memory hot replace - A failed memory board can be replaced while the system ison only if its in a RAID or Mirrored configuration. The system will test, initialize, andrebuild the data on the memory board, then include the board in the system memoryconfiguration. The replacement is transparent to the operating system. For additionalinformation, see “Hot removal and insertion of memory boards” on page 87.■ Memory hot add - You can increase the memory capacity of the system while theoperating system is active only if its in a RAID or Mirrored configuration. Memorycan be removed and replaced on only one memory board at a time and the memoryboard must be replaced before attempting to remove another board. If your server isconfigured for Maximum Compatibility, a new memory board can be added to anempty slot. The system will test and initialize the new memory, then inform theoperating system. For additional information, see “Hot removal and insertion ofmemory boards” on page 87.Caution Do not attempt to hot replace or hot add a memory board in anon-redundant configuration. If your server is not configured forMaximum Compatibility, Memory RAID, or Memory Mirroring in theBIOS setup utility, you must turn off your server before removing orinstalling any memory board or DIMMs.Caution Memory board air baffles are installed in memory slots withoutmemory boards. These air baffles must be removed to install amemory board. To maintain the correct airflow in your server andprevent overheating, if you intend to remove a memory board fromyour server and not replace it immediately, install a memory boardair baffle in the empty slot.
