Dagger-
He identified a 8600gt, but not which one - 256, 512, or 1 G, or what additional cards are installed. I have 256 GPU, Tv tunner card, 2 pairs of raid 0 HDD's and two dvd writers.
As too 64 bit operating system: Remember the vast majority on this forum are gamers and vista64 is great. Sometimes it is not just hardware problems, which for the most part have been solved; Sometime it is performance issues. He has a dual-quad core workstation ($8K), 30 in monitor plus a 22 in monitor. He does high end streaming video hardware/software design for HIS company. He tried vista 64, took it off as it was approx 25% slower do to "bloat" coding.