Agreed. If you can't tell from the device manager, take a look at look at the inside of your computer. First find the earphone/speaker jacks on your computer (if you have none, you probably don't have a sound card at all). Keeping those jacks in mind, look inside your computer. If the jacks are connected to a card, you can remove the card and try to find identifying markings on the board. If the jacks look like they're connected to the motherboard, the best bet would be to consult the mother board manual or the website of the company that makes it.