I've HP Pavilion Notebook (db6000). It has AMD Turion™ 64 X2. It came pre-installed with Windows Vista Home Premium. I smoked it and installed Vista again. But in spite of it being touted at 64bit I was not able to install Vista 64 bit version. It only allows 32 bit one. So I'm wondering if the processor is really 64 bit or a marketing gimmic for 32 +32 = 64 bit [it is dual core for sure :) ]
EDIT:- Why am I not able to install 64-bit version of Vista if the processor is 64-bit?