I can spend up to 600 usd and i want to place them in my big room . While i might sound dumb, its better to ask than to feel sorry. If i purchase some big 2.0 speakers i wont burn my soundcard right ?
You can connect whatever you want to the sound card, the power for them won't be from the card but from the amp, either the powered speakers or an amp setup for the speakers.
So this will be for whole room listening like with a stereo system but from the computer, not for use when sitting at the computer? The setup will be a bit different. For whole room listening like on a couch, you would want the speakers further from you and more apart. For computer listening when you are a few feet from the speakers, they would be closer together and lower power.
If you will do both you may want to have dual setups of speakers, maybe a $100 nice setup for PC use, and a second larger setup for room use that is run off a real amp/preamp.
If you are OK with having the speakers a bit further out when on computer, you can get a nice set or powered speakers like these
https://www.amazon.com/dp/B0010LH2V...lja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ&th=1
Quite a few models of those types of speakers have bluetooth built in so you can connect your phone or something direct to them and play music off that.