Other World Computing (OWC) today unveiled its Mercury Extreme product line with a G4/1.33GHz processor upgrade, which is available immediately for US$580. The Mercury Extreme G4 features a Motorola PowerPC G4 7455a 1.33GHz processor, 256 Kilobytes of 1:1 L2 cache on-chip and 2 Megabytes of high-speed synchronous dynamic RAM (DDR L3) operating at up to 267 Megahertz (MHz). It is compatible with Sawtooth, Gigabit Ethernet, Digital Audio, Quicksilver and Quicksilver 2002 Power Mac models, and supports Mac OS 9.2.1 and higher, as well as OS X.