Yes. FreeBSD currently runs on the Intel x86 and the AMD64 architectures. The Intel EM64T, IA-64, ARM®, PowerPC®, 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.