As a side note as well I stumbled across the fact that when I have the factory board plugged in only to the PC, I can read the card files but cannot move the motors because simply there is not enough power. BUT when I plug the board into the power supply the SD card reader gets all goofy and everything moves except the extruder. I found all of the settings under "control" in the LCD screen and entered them into the sainsmart but it seems like it doesn't work well with it even though everything is right. I odered a RAMPS 1.4 from amazon and I have an Arduino Mega so maybe i'll give that a shot!