> If the CPU is not fully 64 bit, then it will only use (not see) 4GB of > memory. After completing overhead actions this leaves something in Nope. An x86 processor with PAE can be 32bit but can address 36bits of address space (just not directly all at once). This needs a lot of management and if you add a lot of memory to a 32bit box it spends more and more of its time changing which memory it is looking at. > the range of 3.5 GB for the Operating System and other > applications.... > > Adding more memory than this limit will not result in better > performance and may actually make matters worse. If the board supports it. It can indeed often reduce 32bit performance that kicks in well below 4GB however because of the need for mappings of hardware space, user space and kernel. More than 900MB or so starts to hit it and by 2GB its having measurable impact. Above 4 you really want 64bit. -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
