trying to ID the part number of the Internation Rectifier pwm controller chip on this card, but Im having a hard time making it out. From my limited experience, ive always seen the controller on the back of cards, not the front, but i dont see any chips on the back. so im assuming this is the main power controller IC. I think the chip reads:
but i cant find a chip with that P/N (CHL8218). anyone else have an idea?