You could prolly adjust the clock speed of the 030 already in your se/30 
similar to the way you can a IIsi.  The 030 may run at higher speeds by 
cutting certain jumpers/resistors...it's only /guarenteed/ to run at the 
speed the machine shipped at.  There was an article about this in Feb 
1995 Macworld, I think, but I'm 2000 miles from my macworlds.. :>  It 
could be done, but you do risk killing the processor or the motherboard.

 On Fri, 7 Jun 1996, Greg Bartlett wrote:

> On Fri, 7 Jun 1996, Ben Hockenhull wrote:
> 
> > Date: Fri, 7 Jun 1996 13:05:47 -0600
> > From: Ben Hockenhull <benh@inlink.com>
> > To: port-mac68k@NetBSD.ORG
> > Subject: Motorola cpus and swappability
> >
> > I have an old Apollo 400t that I'm upgrading to a 425t via motherboard
> > swap.  The 400t board has a socketed Motorola 68030 chip that runs at
> > 50mhz.
> > Hmmm....I thought, Maybe I can put that cpu in my SE/30 which runs MacBSD...
> > S
> > So, my question is, can anyone think of a reason why I would not want to do
> > this?  I assume that since its an 030 chip, just faster, there shouldn't be
> > any problems but wanted to make certain before going ahead.  It sounds to
> > me a lot like putting in a DayStar 50mhz accellerated chip.  Am I
> > overlooking anything glaringly obvious here?
> >
> > Thanks.
> >
> > Ben
> >
> Typically the clock driving the chip is on your motherboard.  So
> replacing your processor with a "faster" (read higher speed rated) one
> will not accomplish anything.
> 
> The Daystar is most probably a small circuit board that, amoung other
> things, has a faster clock mounted on it.
> 
> Greg
> --
> Greg Bartlett                          Automatic Data Processing (ADP)
> CM Systems Administrator               Dealer Services Division, R&D
>                                        2525 SW First Ave.
> bartlett@plaza.ds.adp.com              Portland, OR 97201
> 
>