Launched in 1990, the Power multichip architecture, developed by IBM for its RS/6000 PowerServers and PowerStation workstations, was introduced with clock speeds of 20, 25 and 30 MHz. The 32-bit Power1 was IBM's first RISC processor. The chip was manufactured in a 1000 nm process, and had 6.9 million transistors. IBM updated the Power1 to the Power1+ in 1991 and the Power1++ with up to 62.5 MHz in 1992. The current iteration is the Power7 with clock speeds up to 4.25 GHz.