How to tell whether CPU supports x64?

[John Levine]

>I have a remote server, and I'd like to know if it will support
>64-bit instructions. Is there some way I can tell? It's running 32-bit
>FreeBSD right now.
>
>>From dmesg.boot:
>	Timecounter "i8254" frequency 1193182 Hz quality 0
>	CPU: Intel(R) Xeon(TM) CPU 2.40GHz (2387.76-MHz 686-class CPU)
>	Origin = "GenuineIntel"  Id = 0xf29  Stepping = 9
>	Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
>	Features2=0x4400<CNTX-ID,<b14>>
>	Logical CPUs per core: 2
>	real memory  = 1073676288 (1023 MB)
>	avail memory = 1041502208 (993 MB)
>	ACPI APIC Table: <DELL   PE1750  >
>	FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
>	cpu0 (BSP): APIC ID:  0
>	cpu1 (AP): APIC ID:  1

Looking at the Intel web site, the only Xeon I see that runs at 2.4GHz
and has two cores with two threads is the Xeon 3060, which does indeed
provide the 64 bit instruction set.

http://ark.intel.com/Product.aspx?id=27205&processor=3060&spec-codes=SL9TZ,SL9ZH,SLACD