Intel S3420GPLX User Guide - Page 29

The Independent Channel Mode is the default Maximum Performance Mode preferred for Intel® Xeon® processor 3400 series based platforms. All two channels may be populated in any order and have no matching requirements. All channels must run at the same interface frequency, but individual channels may run at different DIMM timings, CAS latency, and so forth). Power Supply A minimum of 350 W is required. Your supply must provide a minimum of 3 A of 5-V standby current or the board will not boot. Optional Hardware Intel® SAS Entry RAID Module AXX4SASMOD The Intel® Server Board S3420GPLX provides a SAS module slot (J2H1) for the installation of an optional Intel® SAS Entry RAID Module AXX4SASMOD. Once the optional Intel® SAS Entry RAID Module AXX4SASMOD is present, the x4 PCI Express* links from PCI Express* x2 switch to the SAS module slot. The optional Intel® SAS Entry RAID Module AXX4SASMOD includes a SAS1064e controller that supports x4 PCI Express* link widths and is a single-function PCI Express* end-point device. The SAS controller supports the SAS protocol as described in the Serial Attached SCSI (SAS) Standard, version 1.0, and also supports SAS 1.1 features. A 32-bit external memory bus off the SAS1064e controller provides an interface for Flash ROM and NVSRAM (Nonvolatile Static Random Access Memory) devices. The optional Intel® SAS Entry RAID Module AXX4SASMOD provides four SAS connectors that support up to four hard drives with a non-expander backplane or up to eight hard drives with an expander backplane. The optional Intel® SAS Entry RAID Module AXX4SASMOD also provides a SGPIO (Serial General Purpose Input / Output) connector and a SCSI Enclosure Services (SES) connector for backplane drive LED control. Intel® Server Board S3420GP User Guide 27