The problem is, if i burn DVD at 8x, the buffer jumps up and down and the whole burning process takes very long time. also i cannot select DAO96 if i want burn CD. These problems occured, when updated my nero to version 126.96.36.199. If i reverted back to 188.8.131.52 i'd previously used, the problems where gone. If updated to 184.108.40.206 again, the problems came back. Drive's firmware is 1.29 and installed in USB external enclosure. i have no another burning software installed but nero.