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<!--
$FreeBSD$
-->
<sect1 id="proc">
<title>Supported Processors and Motherboards</title>
<para>Since mid-2003 &os;/&arch; has supported the &arch.print;
(<quote>Hammer</quote>) and Intel EM64T architecture,
and is now one of the Tier-1 platforms (fully
supported architecture), which are expected to be Production
Quality with respects to all aspects of the &os; operating system,
including installation and development environments.</para>
<para>Note that there are two names for this architecture,
AMD64 (AMD) and Intel EM64T (Extended Memory 64-bit Technology).
64-bit mode of the two architectures are almost compatible
with each other, and &os;/&arch; should support the both.</para>
<para>As of this writing, the following processors are
supported:</para>
<itemizedlist>
<listitem>
<para>AMD Athlon64 (<quote>Clawhammer</quote>).</para>
</listitem>
<listitem>
<para>AMD Opteron (<quote>Sledgehammer</quote>).</para>
</listitem>
<listitem>
<para>Intel 64-bit Xeon (<quote>Nacona</quote>).
This processor is fabricated on 90nm process technology, and operates
with 2.80 to 3.60 GHz (FSB 800MHz) and Intel E7520/E7525/E7320 chipsets.</para>
</listitem>
<listitem>
<para>Intel Pentium 4 Processor supporting Intel EM64T
(<quote>Prescott</quote>).
This is fabricated on 90nm process technology,
uses FC-LGA775 package, and operates with 3.20F/3.40F/3.60F GHz
and Intel 925X Express chipsets.
The corresponding S-Spec numbers are SL7L9, SL7L8, SL7LA, SL7NZ, SL7PZ,
and SL7PX. Note that processors marked as 5xx numbers do not support
EM64T.</para>
</listitem>
</itemizedlist>
<para>Intel EM64T is an extended version of IA-32 (x86) and
different from Intel IA-64 (Itanium) architecture, which &os;/ia64
supports. Some Intel's old documentation refers to Intel EM64T as
<quote>64-bit extension technology</quote> or <quote>IA-32e</quote>.</para>
<para>The largest tested
memory configuration to date is 8GB. SMP support has been
recently completed and is reasonably robust.</para>
<para>In many respects, &os;/&arch; is similar to &os;/i386, in
terms of drivers supported. There may be some issues with 64-bit
cleanliness in some (particularly older) drivers. Generally,
drivers that already function correctly on other 64-bit platforms
should work.</para>
<para>&os;/&arch; is a very young platform on &os;. While the
core &os; kernel and base system components are generally
fairly robust, there are likely to still be rough edges,
particularly with third party packages.</para>
</sect1>
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