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Subject: Re: How to tell whether CPU supports x64?
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Tait wrote:

> 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
> 
> I've had no luck trying to search for the id/stepping. Would the
> feature list show x64 support?
> 
If memory serves, another way to look at it might be to check your Front 
Side Bus speed. If this is Socket 604 I believe FSB speeds of 533MHz were 
not 64 bit CPUs. I seem to recall that 64 bit support did not start until 
the 800MHz FSB processors came out.

-Mike