Hello there, fallen soldiers. I am in the exact same situation, messaged them a lot, sometimes they did not even respond to me and finally after a while, after a few more messages they responded and said the sound card is broken. I'm not an expert in electronics but how can a card be broken if after a while of waiting, I restart my pc and finally it works? And it's not like it is a defective capacitor so it stops while running. No. The card works perfect after it gets recognised and as long as the PC stays on, or even after a restart. How can that be a defective card? I don't know, ask Asus. But wait...they more likely will not respond. This is either a bad bios written on card, either a defective component. But the problem is a lot of people have the exact same problem even if they bought the card 5 years ago or 1 year ago, and might be a factory fault and Asus don't recognise it. Anyway, I don't even care anymore about the 70 euro I paid for it 4 years ago. I just will not buy anything about Asus anymore. They have so bad support with clueless people that are not even sending the report of the problem, do not respond, do not care. Engineers are as bad in this company. I bought those 7.1 rog theta headsets and the sound was literary c*@p. If they consider that is an hi-fi audiophile sound, they are probably deaf(great part is that I could return them and get my money back). They just don't know how to make sound, not anymore. I've had their xonar dg, a used one, and after 9 years, it still worked without a problem. Components hardly just go "defective" if the implementation is one made with brain.
I truly suggest you to buy Creative sound cards. I have now a Creative AE-7 for more than half a year and I can't be more happy. The sound is what it should be, and the drivers got extremely mature. I've had not even a single bug or problem with the card. Not like Asus' Strix Soar card that had issues after a year of being on market. The eq did not register any modification until they finally came with a software update after a looong waiting time. You might pay a little more for creative, but you pay for something good, something professional made, something made with brain and with support on software side. Asus don't even want to respond us and at least tell us it's a defective card or something. But I bet they don't even know what the problem is with those engineers of theirs :P. Goodbye, Asus. And everyone I know will say you goodbye. I allready left a few negative comments for this sound card in my country and many more clients will say you goodbye with time. I even had to stay like 5 days to get approval on my new made account so I can write here. So pathetic.
P.S.: I think they are a bit behind with technology, only a few good years behind, and they did put an old school lamp amplifier on it. That why it works only after a few minutes. It takes time to get warm :D:D:D