On Nov 15, 2007 4:11 PM, Joshua Wood <[EMAIL PROTECTED]> wrote: > > 64 bits is neither here nor there in a vaccuum. you want 64 bits if > > a) you need more than 4GB of memory, or > > a) those extra registers and direct vlong really matter for > > performance. > > otherwise it's just a lot of extra zeros. > > it's kind of silly to run 64-bit linux on a machine with <= 4GB of > > memory. > > > > Some testing we did about a year ago showed that (for us) even the > extra registers -- I always thought the sweetest-sounding part of the > deal -- help sometimes, but not always. I ended up thinking it was > because caches hadn't necessarily grown apace with address space. The > distance between cpu and main memory seemed to have expanded again... >
Intel or AMD? I've found AMDs memory architecture for 64bit stuff to pretty much stomp Intel nearly every time.
