Reddit reviews Rockville Pair Computer/Bookshelf Desktop Speaker/Studio Monitor Stands (RHT8G)

For some reason he has a good sound card but crappy speakers. That makes me think he likes music/sound? If so, maybe consider new speakers. I would recommend the Micca PB42x speakers with an aux cable, then either buy or make some stands. If he would like a subwoofer too the Dayton Sub-800 with an aux to rca cable can pack some good punch without pissing off the neighbors too much. This setup would be more than enough for the average gamer/music enthusiast. It will be worlds above what he has now. However, if he does any music recording/mixing, maybe head to /r/audiophile or /r/budgetaudiophile for more specific recommendations.

Quick note: surround sound usually doesn't make sense at a desk, but you can certainly add more speakers to what I have listed here if you'd like.

Edit: oh yeah, you'll also want a speaker cable or some speaker wire (if he has wire strippers) to connect the two speakers to eachother.