Updated from 8:43 a.m. ESTCanadian chipmaker ATI Technologies ( ATYT) returned to a profit in its fiscal second quarter and announced its CEO was stepping down. Net income increased to $47.6 million, or 19 cents a share, vs. a loss of $9.4 million, or 4 cents a share, a year ago. Analysts were expecting a profit of 16 cents a share, according to Thomson One Analytics. Revenue rose almost 48% to $463.3 million, with personal computer product sales up about 35% from the year-ago period. Gross margin rose from 28.9% to 34.8%. The Ontario-based company also said that CEO KY Ho would be replaced by Dave Orton, now president and COO, on June 1, in what it called a natural succession. Ho will remain as company chairman. Looking ahead, ATI forecast third-quarter revenue of $440 million to $480 million, vs. a consensus forecast of $449.1 million. Gross margin, as a percentage of revenue, is expected to be in the upper half of its target range of 32% to 35%, the company said. Shares rose 25 cents, or 1.5%, to $16.55.