My card is a 4GB and say class 6. It still is unbelievably slow. When connecting to internet, the touch screen keyboard blacks out. Terminal isn't working, although I can see it when it is "minimized" running in the background. When booting it starts all black after a minute with the usual text, and take several minutes before it does anything. I tried it a month or so ago, and it worked better back then than it does now.