Share 'Needing help !'

I bought a new graphiccard :nvidia geforceGTX 560 , and after one of my friends installed it, I found that I´ve often got distortion when I worked in Reaper and Sibelius . One guy at the Reaper forum said that nvidias graphic cards often has  that impact when working with music software . Anyone here who has the same experience ? and what shall I do ? I know there is many here who is good at comp…