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- Path: sparky!uunet!stanford.edu!agate!darkstar.UCSC.EDU!cats.ucsc.edu!speth
- From: speth@cats.ucsc.edu (James Gustave)
- Newsgroups: comp.sys.mac.hardware
- Subject: Re: 25 mHz IIsi--another success story
- Date: 6 Nov 1992 09:34:11 GMT
- Organization: University of California; Santa Cruz
- Lines: 31
- Message-ID: <1dde6jINNa1n@darkstar.UCSC.EDU>
- References: <1992Oct31.081637.12586@doug.cae.wisc.edu> <1992Nov2.183703.951@doug.cae.wisc.edu> <1992Nov3.153835.3035@newstand.syr.edu>
- NNTP-Posting-Host: am.ucsc.edu
- Keywords: 25MHz ][si upgrade IIsi
-
-
- Damn the disclaimers and the nay-sayers, I did it this morning and my IIsi
- is hauling ass!
-
- It took me about an hour to solder out the old oscillator and put in a socket.
- Then I just attached the heat-sink, slotted the new oscillator and it was
- off and running.
-
- I used a 30 watt iron, which seemed to be enough. The advice about working
- one pair of pins at a time proved to be really helpful. I heated the
- connection from the bottom of the board while gently prying the oscillator
- from the top. The patience paid off.
-
- Speedometer 3.1 results from before and after indicate an overall performance
- increase of 43%, there was a 75% increase in 8-bit color speed!
-
- Some info about my system:
- 68030xx20 (The processor was rated at 20 MHz)
- System 7.1
- 5 megs RAM (I'm not sure, but I assume 80ns)
- NuBus adaptor, no NuBus card
-
- According to Speedometer, the FPU operations increased by an average of
- 30%, which confirms that the FPU takes its timing from the oscillator on
- the main board.
-
- Everything's so quick now, I can't stand it.
-
- --
- Jim Speth
- speth@cats.ucsc.edu
-