[64 bit] Doubt about graphic card drivers

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http://ubuntuforums.org – Hello. I want to buy a new graphic card for my desktop PC. Some friends advised to me the ATI Radeon HD 4870 X2, and I want to know if that card has problems with Linux due to its drivers. Because I had problems with the wifi drivers some years ago, and I don't want to have the same problem with another hardware. My current graphic card is an Intel 82945G Express Chipset. (Hardware)