10 Intel® Server Board S3420GPRX User Guide
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 (RAS
latency, 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 S3420GPRX 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.
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