PC Hobbyist

I read you can use a class 4 or higher SDHC card to record HD video. I have a new Canon Powershot SD780is, which records HD video at 720p.

I have two questions:

1. How fast is the video recorded onto the card?
2. Will I notice a big difference between a class 4 and a class 6 SDHC card?

BTW - I had a 16gb Transcend SDHC class 6 card (from Amazon). It died after 5 weeks - the pictures simply disappeared and the card is not readable anywhere. I researched the problem online, and found that apparently A LOT of people are having that exact same problem with the 16gb line of Transcend cards. I was really surprised to read how many complaints there were. So, my advice to everyone here is to stay away from Transcend 16gb cards!!! Apparently the 8 gb cards are okay, but I still wouldn't trust them after my experience.

Thanks for any help with my two questions.

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