Japanese computer chip maker Elpida Memory Inc. has agreed to pay $84 million and plead guilty to taking part in an international conspiracy that led to higher prices for personal computers, the Justice Department said Monday.

Elpida is the fourth manufacturer of dynamic random access memory to admit its role in fixing the price of chips used in personal computers and other electronic devices. The 4-year-old federal investigation has so far netted $730 million in fines.