Firstly, have you installed the drivers from the manufacturers? The drivers supplied with distros are more likely to be 'generic' type drivers.
Secondly, you have posted this 3 times - the mods will come down on you for this. You should only post once.
Thirdly, this post is in the wrong forum - think this is more a software (poss. hardware post.
Anyway, try the latest drivers, that may help.