The Macintosh SE was able to be upgraded to a Macintosh SE/30 by a motherboard replacement.

_BUT_ I’m not sure that the SIMMs RAM are compatible; 120 ns seems to me very
very slow; 80 ns seems to be the right speed.

Of course you must use a special screw tool to open the Macintosh SE case.

One thing is sure is that the SE/30 is fast, faster than the SE...

Emile

-------- Original Message --------
Subject: Re: SE/30 motherboard in SE?
Date: Fri, 28 Apr 2000 10:17:43 +0900
From: Ken Nakata <nakata@sequent.com>
To: Hans-Christian Becker <hcb@phc.chalmers.se>
CC: port-mac68k@netbsd.org
References: <Pine.A32.3.91.1000428011514.19048B-100000@pictor.phc.chalmers.se>

Hans-Christian Becker wrote:
> 
> I have a spare SE and a loose SE/30 motherboard (sans memory,
> unfortunately). Does anyone know whether the SE//30 logic board is
> "pin-compatible" witth the original SE?

Yep.  I think you can even reuse SE's SIMMs on it if they're 30-pin
<=120ns modules.

Cheers,

Ken