Daystar Technology today announced the release of its iMac Flat Panel CPU upgrades. “Daystar is using the latest and highest performing 745x series CPU available, the Freescale 7457. The CPU outperforms any 7457 shipped by Apple, and boasts a large 512 MB internal L2 cache. The large cache allows the iMac G4 to perform at full speed, even without an external L3 cache.” The upgrade is priced at US$548.