On Fri, 2 Feb 2007 16:21:08 -0800 (PST) [EMAIL PROTECTED] wrote: > > Most benchmarks I have seen show no real performance gain with > > x64. If the > > piece of software in question is built and optimized for x64, then > > we'll see > > gains, but not much software is in that boat right now. > > The biggest gains come with number crunching. I'm working with > cryptographics hash functions where I need to multiply large numbers > together. A 64-bit multiply is able to do 4 times the work of a > 32-bit multiply, not to mention the overhead involved with assembling > the 32-bit pieces together. This can lead to huge performance gains, > but only because it is tailored to such an improvement. Most GUI > programs are IO bound and can't really take advantage of 64-bits. > > -Joe
That and accessing more than 4GB of ram. The address space of a 32-bit processor is limited by the size of a 32-bit register. With 64-bit registers, your address space is that much larger. Jason
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