No worse than the DIP DRAM chips preceeding the SIPPS, and at least on a SIPP
you could see a bent pin unlike one that bent under on a DIP DRAM chip or any
other mucho-insertion-force item. They had it right on vacuum tubes-make solid
pins that are hardy and round. It was rare in my old radio days that I'd ever
bend a pin, especially on the HV tubes (you bend one of those and you really
Richard Erlacher wrote:
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.
From: Max Eskin <max82(a)surfree.com>
To: Discussion re-collecting of classic computers
Subject: Re: 30-pin SIMMS
Date: Saturday, February 27, 1999 9:10 PM
On Sun, 28 Feb 1999, Tony Duell wrote:
>A SIPP is exactly a SIMM with pins soldered on - even the pinouts are
> >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)