Diamond Viper 550 card prevents changing settings

[dkw27]

Hopefully, this will be the last post in regards to my problem..After swapping out video cards, I was able to change the settings, & begin to place the lyrics to my first song...I made it thru the entire song, hit "play my song" the audio played fine, but the words began to slowly draw on the screen, not even close to keeping up with the audio..I attribute this to insufficient RAM on this older Millenium card...I've read that MTU suggests using an ATI video card...Please tell me which one works best with KHP & Vogone...Also, how much onboard RAM should I get?

Thanks so much....