Install amd64 over existing i386

[Chris Hill]

Hi list,

I bought a new machine the other day, and accidentally installed the 
i386 version of FreeBSD on it even though it has a 64-bit processor. It 
works fine, but I think I'd rather have the "right" version. So, two 
questions:

1. Is it even worth worrying about at this point?

2. Can I just install amd64 without destroying existing filesystems and 
files? I realize I'll have to reinstall my ports, but that's OK.

Thanks.

More info below. Yes, the CMOS clock was set incorrectly when I did the 
install.
$ uname -a
FreeBSD tripel.monochrome.org 10.1-RELEASE FreeBSD 10.1-RELEASE #0 
r274401: Tue Nov 11 22:51:51 UTC 2014 
root at releng1.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC  i386

Relevant part of dmesg:
CPU: Intel(R) Core(TM)2 Duo CPU     E8500  @ 3.16GHz (3158.81-MHz 686-class CPU)
   Origin = "GenuineIntel"  Id = 0x1067a  Family = 0x6  Model = 0x17  Stepping = 10
   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=0x408e3fd<SSE3,DTES64,MON,DS_CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,XSAVE>
   AMD Features=0x20100000<NX,LM>
   AMD Features2=0x1<LAHF>
   TSC: P-state invariant, performance statistics

-- 
Chris Hill               chris at monochrome.org
**                     [ Busy Expunging </> ]