I've got a problem with Xtreme Gamer and nForce4 and I find new solution that finally works for me. I use Windows XP SP3, not Vista, but I think a problem and a solution are same.
X-Fi and nForce4 SCP problem solution (for Google) :
Go to Windows hardware manager, find disk controllers folder, look for "NVIDIA SATA" or something like that. Change driver
to "standard PCI IDE" for each NVIDIA SATA controller, reboot. I get rid of crackling!
Also, this may be not only drivers
, but also latest beta BIOS for my motherboard... Only latest BIOS with NVIDIA SATA drivers does not solve problem, anyway.