Well it's not as simple as it sounds.
In order to view the actual IRQ your soundcard is using, you must go into the Device Manager and select in the main top menu View -> Resources by connection.
Now if you're not familiar with how a PC works, the data displayed might be confusing. Just open the Interrupt Request (IRQ) node. There will be A LOT of (ISA) some number entries. Scroll down until you reach (PCI) some number devices.
The some number is the actual IRQ number. The sound card will most probably be listed as High Definition Audio Controller. Make a note of the IRQ number. Also make a note of what devices share the IRQ with the sound device.
It is not yet possible to change the IRQ values. The problem is that your motherboard is ACPI and PnP compliant. This means that the OS or/and the devices (this is what means to have a PnP device) are negotiating with the BIOS to get the IRQ numbers.
Right click on the audio device entry and choose Properties. There will be a Resources tab. In this tab you'll see more then just the IRQ. You might also see a Memory Range and other stuff. What you're interested is the IRQ in that list.
If ACPI and PnP is enabled in BIOS, then the Change Setting... button will be disabled, and Use automatic settings will be checked (and also disabled).
What you need to do now is go into the BIOS and change the PnP value to Disabled or OFF. Not sure how it is in your BIOS. ACPI also has some influence on the settings but don't change the ACPI setting. If you do your operating system might not boot anymore (BSOD at boot)! You've been warned.
Now some motherboards allow you to change the IRQ values in the BIOS, but even if they do, the OS will override the settings (in most cases that's what's going to happen, not sure if your case is one of them).
The IRQ's are in the section with the option Resources Controlled By.... Different BIOSes have this in Power Options, others in the Advanced Configuration, don't know where yours will be exactly but it's not that hard to find. Change this setting to Manual.
Now you should be able to change the IRQ values in the BIOS. We don't know if they will stick once the OS is running. If you can't change the settings in the BIOS, just go in the OS, in Device Manager and follow the steps you did before. See if the Change Setting... button is now active. If it's not, you'll have to change the ACPI setting in the BIOS but this most likely will result in a BSOD.
If it does you're on your own. Sorry. Hopefully PnP and Resources Controlled By... will be enough.
If the Change Setting... button is active, you can go ahead and try different settings for the IRQ. Which one to use, I have no idea, you'll have to experiment. In my system, it is 22 and it is alone on that IRQ, and it doesn't skip one bit, even if I set it to 192KHz, 24bit. in the driver.
Hope this helps.