i bought 4 aopen kt73proa m.b.'s with via kt133a chipset and 2 ecs k7vza m.b.'s w/the same and NONE of them will play mp3's!!!! both my partner and i have over 3,000 mp3's apiece, none shared, and on both systems 90% of the mp3's skip badly or make a pounding sound throughout the songs. no one has noticed this? all boards came from different retailers. i have called the retailer tech support and the board manufacturers tech support and no one has any idea what the problem is. i have removed all sound cards reformatted and tried onboard sound, all with the same results. i have updated the 4-in-1 via drivers with no luck. all the mp3's play perfectly on other "non kt133a" systems. it is impossible for me to believe we are the only ones with these issues. can anyone PLEASE HELP??? tdean27893@aol.com