Bluescreens in the .sys file for the card is what I found when using a silicon image based card. The other issue is that cheap cards generally leave off capacitors that the manufacturer says to put on, which makes them less stable. Some of the $16 cards I got even have are identical boards to the $30 ones, but have lots missing off them, they leave off the jumpers and external sockets, and a crapload of capacitors.