Yes. FreeBSD currently runs on the Intel x86 and the AMD64 architectures. The Intel EM64T, IA-64, ARM®, PowerPC®, sun4v and SPARC64® architectures are also supported. Upcoming platforms are MIPS® and S/390®, join the FreeBSD MIPS porting mailing list for more information about ongoing work on the MIPS platform. For general discussion on new architectures, join the FreeBSD non-Intel platforms porting mailing list.
If your machine has a different architecture and you need something right now, we suggest you look at NetBSD or OpenBSD.
Symmetric multi-processor (SMP) systems are generally supported by FreeBSD, although in some cases, BIOS or motherboard bugs may generate some problems.
FreeBSD will take advantage of HyperThreading (HTT) support on Intel CPUs that support
this feature. A kernel with the options SMP feature enabled will
automatically detect the additional logical processors. The default FreeBSD scheduler
treats the logical processors the same as additional physical processors; in other words,
no attempt is made to optimize scheduling decisions given the shared resources between
logical processors within the same CPU. Because this naive scheduling can result in
suboptimal performance, under certain circumstances it may be useful to disable the
logical processors with the machdep.hlt_logical_cpus sysctl
variable. It is also possible to halt any CPU in the idle loop with the machdep.hlt_cpus sysctl variable. The smp(4) manual page has
more details.