The Centris 650

[achairapart]

http://www.cy384.com/projects/centris-650.html

[h2odragon]

> We take advantage of this by "converting" the machine into a Quadra 650, which involves desoldering resistor R151 and mounting a 1.2K 0805 resistor at R152. After this, the new chip was solid at 44 Mhz.

Back in the day overclocking was more of an adventure.