Date: Thu, 4 May 2006 14:11:31 -0400 From: Bill Moran <wmoran@collaborativefusion.com> To: Charles Swiger <cswiger@mac.com> Cc: kep.woof@gmail.com, freebsd-questions@freebsd.org Subject: Re: which graphics card? Message-ID: <20060504141131.20d3ef96.wmoran@collaborativefusion.com> In-Reply-To: <DD896454-7BCE-4281-B457-0C3273D92196@mac.com> References: <9c8168780605040928j3c57ec2dne835d4f449abbfab@mail.gmail.com> <C1A969A6-F28E-4B88-BD5B-6A8C57E48D78@mac.com> <9c8168780605041025u234c4cd2s4191a6eacb0de9ad@mail.gmail.com> <DD896454-7BCE-4281-B457-0C3273D92196@mac.com>
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Charles Swiger <cswiger@mac.com> wrote: > > Are you saying that it just means you can address more memory? > > No, the CPU registers and the address bus can be wider (not just the > memory bus) with Intel EM64T or AMD64 architectures, and can get more > work done per clock for some tasks, but can also be slower for some > common tasks, too. > > Again, if you have more than 4GB of RAM, using the CPU in native 64- > bit mode is probably the way to go; if you've got less, using the CPU > in 32-bit mode might very well work better, but it really depends > upon the type of processes you run. In our experiments, we found that a 32-bit PAE kernel allowed us to access all the memory we had in the machines, and performance was better than a 64-bit kernel. -- Bill Moran Potential Technologies http://www.potentialtech.com
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