&os;/&arch; has supported the &arch.print; (Hammer) architecture since mid-2003. It made its first debut as an experimental release based on &os; 5.1-RELEASE. As of this writing, this port supports the Athlon64 (Clawhammer) and Opteron (Sledgehammer) machines. The largest tested memory configuration to date is 8GB. SMP support has been recently completed and is reasonably robust. 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. &os;/&arch; is a very young platform on FreeBSD. While the core FreeBSD kernel and base system components are generally fairly robust, there are likely to still be rough edges, particularly with third party packages.