Memory chipmakers have been sued for price-fixing arrangements that raised the cost of Macs and other PCs.

The price-fixing is said to have inflated the cost of personal computers and other electronic devices from the likes of Apple, Dell HP and IBM. Those companies had to raise prices or reduce the amount of memory installed to compensate for the higher costs, according to the prosecutors.

Elpida, Infineon, and Hynix Semiconductor have all made guilty pleas. Other defendants include Micron, Mosel-Vitelic, Nanya and NEC. Samsung, Winbond Electronics, Toshiba, Hitachi and Mitsubishi are seeking to settle the allegations outside of court.