Because I use lots of memory, 8 gb of it, in my Quad core box I neded a 64 bit o/s and chose Vista 64. Its very stable, far more so then my old XP32bit. I did try Vista32 on my older system and wasnt overly impressed, but vista64 on my new box is very slick.
Yes, being x64 soem hardware doesnt work. My Q guider for example wont work as there arent x64 drivers available yet. However I use that on my XP laptop anyway. My 450D works great with Vista64 but the modded 350D wont. Iris software works well with Vista but is only single threaded though still faster then my old system. Im hoping they may release a multithreaded version someday.
Scott
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