All the cards I've tried, work just fine in my PS3, but, not my Wii. It's possible, that atleast one of the ones I got is fake, & the 2 I just bought from Costco, are Ultra II's, & someone mentioned to me that those probably won't work in any Wii. I have another one coming in the mail, which is probably fake, but, it was cheap, & specifically said it was for the Wii.