It also depends on workload. Video operations, virtualization, and compilers are better on modern 64bit, since that is the only mode that supports the whole hardware feature set (avx, vt-d, iommu, etc.). Programs that memory map disk access can similarly get a boost from the larger address space, etc. <div class="gmail_quote">On Feb 5, 2013 3:02 PM, "Jonathan Billings" <<a href="mailto:billings@negate.org">billings@negate.org</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> On Tue, Feb 05, 2013 at 10:59:53AM -0800, Troy wrote: > Presently I am running 32 bit Ubuntu 12.04. I was wondering if it is > possible, with my current processor and motherboard, to speed up the > execution of 12.04. Thanks and stay warm... troy Running a 64-bit OS on a system that's working fine on a 32-bit OS, assuming you have less than 4G of RAM, will probably not produce a noticeable speed increase. 64-bit binaries are a bit larger on average, so some aspects might be slower. PAE kernels are a lot slower with >4G of RAM regarding memory operations, though, which is why everyone is asking how much RAM you have. -- Jonathan Billings <<a href="mailto:billings@negate.org">billings@negate.org</a>> _______________________________________________ linux-user mailing list <a href="mailto:linux-user@egr.msu.edu">linux-user@egr.msu.edu</a> <a href="http://mailman.egr.msu.edu/mailman/listinfo/linux-user" target="_blank">http://mailman.egr.msu.edu/mailman/listinfo/linux-user</a> </blockquote></div>