I have: the motherboard Abit NF7 and the video card HIS HD4670 AGP with a HDMI output. OS: Win XP SP3. Microsoft UAA Bus Driver for High Definition Audio (VEN_1002&DEV_AA38) correctly works only at IRQ15! Otherwise gives out an error about shortage of resources: But on IRQ15 the second IDE controler which in case of switching on in BIOS forces out all devices from IRQ15 on other IRQ settles down. Really HDMI Audio Device works only at IRQ15? Whether if yes, that in that case is sense to modify BIOS? Or after modification BIOS of the motherboard HDMI Audio Device will be able to work and at other IRQ?