Radeon graphics card problems

Ive recently encountered a problem with PA and so have alot of others with they same type of graphics card, some may be ATI radeon mine is AMD radeon, I have come across the problem where I am not able to see any iron ore and the planets graphics aren't rendering. Every once and a while the planet will turn black and white with spots everywhere to seem like it is rendering but then it goes back. I have a iMac 21.4 ( i know its sad i want a PC too) so that could be a problem also, but i highly doubt it. This graphics card has had many problems, for example, league of legends not rendering anything and the same for dota 2. So if anyone (or even the good folks at Uberent) could find a fix that would help all of us with this horrible graphics card out .
~Ender