Win xp + audiophile 24/96

Citation :

A sure sign that you should get rid of ACPI is that several devices connected to the PCI bus are sharing one IRQ. Mostly, this is IRQ 9. If you use Windows 2000, you will more than likely have this problem, as Windows 2000 with activated ACPI seems, for some unknown reason, to believe that sharing IRQs in this way is useful. Normally this should not be a problem, but IRQ sharing does not give good performance. Although the computer does not crash, and everything functions in principle, the performance is significantly worse. It is possible that you may experience dropouts when using audio cards and USB/MIDI simultaneously, even when you have selected the highest possible latency in your ASIO driver. All additional transfers through the PCI bus (e.g. copying of data over a network card) result in the audio performance of your computer collapsing totally, regardless of how fast your computer may be. Many improvements in this respect found their way into Windows XP, and although IRQ sharing is not a problem most of the time, ACPI can still cause a variety of problems under Windows XP. If your motherboard offers APIC, then you can, in most cases, leave the ACPI mode installed.