The European Commission has issued formal charges against computer chip maker Intel for allegedly using illegal tactics against its smaller rival Advanced Micro Devices. The Commission has spent years investigating Intel’s practices to determine if it acted unfairly to preserve its dominance over AMD. The two companies make all the central processing unit chips at the heart of the world’s personal computers and servers. AMD has sued Intel in the United States, South America and other jurisdictions, but no judgments have been made by courts. Intel settled charges with the United States Federal Trade Commission in 1999 and the FTC dropped an additional investigation about the firm’s marketing practices in 2000.