Hi Mark
Unless you specified the 64bit Windows when ordering, it is unusual for it to be installed on a new PC. (Unless you are a developer or Network Technician etc, it has no advantage over the Standard 32 bit Windows XP Pro)
Also 64 bit drivers for most peripherals are pretty limited at the current time, so it is unlikely that one is included with the Tyros. (Particular as the Tyros 2 is still using P3 technology)
Point to note. The Standard 32 bit Windows XP has full support for Dual core processors and SLI.
Hope this helps.
Bill
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