Originally, the SIPP was considered much more reliable than the SIMM. The SIMM sockets were a new product at that time and failure rates were pretty high, and it was easy to package a system more densely with SIPPs than with SIMM's. It was easy to bend the pins on the SIPP's, though, and retailers soon tired of having to hand-hold customers whose problems were simply bent pins, as, once bent, the pins tended to bend again and again until they were broken and repair was improbably if at all possible. Consequently, SIMMs, though less reliable but easier to install, and less likely, in either event, to sustain long-term damage took over the market. Ultimately, socket problems were defeated by persistence, educating the user public, and improved socketing technology. Dick ---------- <classiccmp(a)u.washington.edu> the > >same. And thus SIPPs suffer from bent pins, just like individual chips > >do. That's why they went out of fashion. > > But why did anyone attach the pins in the first place? > > --Max Eskin (max82(a)surfree.com)