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- From: hessmann@unipas.fmi.uni-passau.de (Georg Hessmann)
- Subject: Re: SUMMARY: 16MHz A3000 to 25MHz (!) Hardware "Hack"
- Message-ID: <1992Aug19.120757.16073@tom.rz.uni-passau.de>
- Sender: news@tom.rz.uni-passau.de (News-Operator)
- Nntp-Posting-Host: donau.fmi.uni-passau.de
- Organization: University of Passau, Germany
- References: <1992Aug12.151140.58087@cc.usu.edu> <64213@cup.portal.com> <16r1a6INN1b1@grapevine.EBay.Sun.COM>
- Date: Wed, 19 Aug 1992 12:07:57 GMT
- Lines: 30
-
- In article <16r1a6INN1b1@grapevine.EBay.Sun.COM> smckinty@sunicnc.France.Sun.COM (Steve McKinty - Sun ICNC) writes:
- >In article <64213@cup.portal.com>, Tony-Preston@cup.portal.com (ANTHONY FRANCIS PRESTON) writes:
- > > When the CPUs are made, a few out of large batch(statistical sample)
- > > are selected and tested. IF they pass, they get the higher speed, if
- > > not, they drop down to the lower speed and test again. Not every
- > > CPU in the batch is tested, maybe the guy was lucky and got a fast
- > > one from a slow batch...
- >
- >When they do that sort of testing they test everything on the chip. Perhaps
- >he got a chip where most of it works OK at 25MHz, but some less-frequently
- >used instructions sometimes fail. It would seem to work, maybe a guru every
- >few days, which isn't that unusual, or an occasional corrupted file.
- >
- >It might seem to work OK, but would you want to trust it for anything important?
-
- I've bought the A3000 with the 16MHz -> 25MHz hack directly from a dealer.
- This dealer has given me a one year warranty and the promise, that I can
- trade my 25MHz hack-A3000 for a real 25MHz A3000 if any problems occure.
-
- This dealer has sold more than one upgraded A3000 and does still exist. :)
-
- I think a very good percentage of the 16MHz CPU's are *untestet* 25MHz Chips.
- And if the CPU don't work with 25MHz, don't worry: go back to 16MHz
- and all should be ok.
-
- Georg.
-
- --
- hessmann@unipas.fmi.uni-passau.de (Georg Heāmann)
- (Oberer Markt 7/D-8712 Volkach)
-