XP 32bit vs. Vista 64bit

We have just upgraded all of our machines recently. XP 32works good. With fast, current processors and 4 GB of RAM, I waswondering if Vista 64 would yield SIGNIFICANT increases inperformance.

We are running Dell T3400 and T5400 all with 3.16 Ghz Core 2 andXeon Quad, 4GB RAM, SAS RAID 0, FX3700.

Some of our assemblies and layouts of the assemblies seem to beslowing down lately. I was just wondering if it would be worth thehassle to upgrade, seeing as the hardware is current, or if theincrease is marginal.

Thanks in advance.SolidworksAdministration