On 04/22/2011 05:16 PM, MCBastos wrote: > Interviewed by CNN on 22/04/2011 17:58, Robert Kaiser told the world: > >> Interesting, as AFAIK all Core architecture chips support EM64T - could >> be that it's only Core2 though and Apple shipped some of the older >> "crap" that was called "Core" but wasn't actually a new architecture at >> all (and I know for sure that Core2 has EM64T). > > That's right. The first generation of Intel Core CPUs was actually based > on an enhanced P6 (Pentium Pro/II/III) architecture codenamed "Yonah", > which was 32-bit only. Some of the early "Pentium Dual-Core" were also > P6-based. > > The new "Core" architecture debuted only on the Core 2. AFAIK, it's an > evolution of the Yonah with, among other things, 64-bit extensions > added. So it's still a descendant of the venerable Pentium Pro. > > Although Intel had a really, really confusing policy for a while, in > which it was hard to guess if a given CPU was 64-bit capable, had > hardware virtualization and other stuff -- they disabled features from > some chips aiming for market segmentation. So I wouldn't swear that all > Core 2 and later are actually 64-bit capable, because some of them may > have this feature disabled. >
I've run across this when attempting to install a 64bit virtual machine in VMWare. They've a pretty good article on this at: http://kb.vmware.com/kb/1003945 Turns out that the 64bit laptop that I bought awhile back for 64bit testing with a 'Pentium Dual-Core CPU T4300 doesn't support VT (it does support EM64T). Really pissed me off, so next time I'll check all of the CPU specs before buying another laptop/desktop. http://ark.intel.com/Product.aspx?id=37253 _______________________________________________ support-seamonkey mailing list support-seamonkey@lists.mozilla.org https://lists.mozilla.org/listinfo/support-seamonkey
