Switching from Debian i386 to AMD64

[Richard Owlett]

I have been running Debian i386 since Squeeze. At that time it was 
required as I was considering supporting some donated 32 bit machines at 
church. I don't recall what processor was in my personal machine at that 
time. I've never had cause to investigate the processors in my current 
laptops and desktop machines. They all happily run i386.

Is there a utility that will report my hardware configuration/capability?
TIA