a 486 jump to p5~ impressive!! now to find one.... Collecting microprocessors is fun, and I am,trying to figure a way display the entire array in one large glass panel over it. Perhaps use a half of a sliding glass door as a cover over the display rack.frame. Any other ideas>> Ed # _www.smecc.org_ (http://www.smecc.org) In a message dated 7/10/2015 9:56:24 P.M. US Mountain Standard Time, scaron at umich.edu writes: There absolutely was a P5 Overdrive from Intel for 486 motherboards ... I saw a few of them in the wild back in the day...