grego@darkeyes.sgi.com (Greg Orsini) (08/03/89)
>>>>>>>>>>> 256K SIMMs $35 <<<<<<<<<<<<<
- taken out of working Macs for upgrades
- 150ns
- large qty available
- price too high??? let me know what you think.
$35 or best reasonable offers.
--
Greg Orsini, contractor at large
(408) 476-5292 grego@darkeyes.sgi.com {backbone}!darkeyes.sgi.com!gregogrego@darkeyes.sgi.com (Greg Orsini) (08/09/89)
In article <39440@sgi.SGI.COM>, grego@darkeyes.sgi.com (Greg Orsini) writes: > >>>>>>>>>>> 256K SIMMs <<<<<<<<<<<<< > - taken out of working Macs for upgrades > - 150ns > - large qty available > - price too high??? let me know what you think. > Evidently the prices of these things have come down since I've been involved with such things last. If $35 is too high, what will people pay??? How about $25? Make me an offer. 4 for $80?? You tell me. Again, sorry to repost. Greg. -- Greg Orsini, contractor at large (408) 476-5292 grego@darkeyes.sgi.com {backbone}!darkeyes.sgi.com!grego
z8my@vax5.CIT.CORNELL.EDU (08/09/89)
In article <39816@sgi.SGI.COM> grego@darkeyes.sgi.com (Greg Orsini) writes: >> >>>>>>>>>>> 256K SIMMs <<<<<<<<<<<<< > >> - taken out of working Macs for upgrades >> - 150ns ^^^ >> - large qty available >> - price too high??? let me know what you think. >> What use does anyone have for these? The only useful place for 256K SIMMS is in Mac II/IIx/IIcx/SEx computers, but they require at least 120ns! Sam Paik d65y@vax5.cit.cornell.edu
adam@mit-amt.MEDIA.MIT.EDU (Adam Glass) (08/09/89)
z8my@vax5.CIT.CORNELL.EDU writes: > grego@darkeyes.sgi.com writes: > >> >>>>>>>>>>> 256K SIMMs <<<<<<<<<<<<< > > > >> - taken out of working Macs for upgrades > >> - 150ns > > What use does anyone have for these? The only useful place for 256K SIMMS > is in Mac II/IIx/IIcx/SEx computers, but they require at least 120ns! You're quite wrong. Mac II series computers will work just fine with 150ns SIMM chips. For all normal use, there is no apparent slow down at all. In fact, you can't tell the difference between the two except if you have a SIMM tester or you happen to look at the chips. Adam =============================================================================== || Adam Glass, NeXT hacker for the slave-drivers at the MIT Media Laboratory || || #include <std_dsclmr.h> || || %% "But Westley, what about the R.O.U.S.es?" %% || || %% "Rodents Of Unusual Size? I don't think they exist..." %% || || Remember to send lots of email to: adam@media-lab.media.mit.edu || ===============================================================================
dorourke@polyslo.CalPoly.EDU (David M. O'Rourke) (08/09/89)
adam@mit-amt.MEDIA.MIT.EDU (Adam Glass) writes: >You're quite wrong. Mac II series computers will work just fine with 150ns >SIMM chips. For all normal use, there is no apparent slow down at all. In According to Apple if you use chips slower than 120ns in a 020 or 030 class machine it might result in "data loss". In other words if you start having memory problems and you're using 150ns chips Apple won't do anything to fix it other than "upgrade" your chips for you. Perhaps some hardware type on the net could explain why the 020 and 030 in Apple's products require 120ns or better chips. -- \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\|///////////////////////////////////////// David M. O'Rourke____________________|_____________dorourke@polyslo.calpoly.edu | God doesn't know, he would have never designed it like that in the first | |_ place. ____________________________________________________________________|
hkbirke@mit-amt.MEDIA.MIT.EDU (Hal Birkeland) (08/10/89)
please note the followup line... IMHO, this discussion certainly does not belong in misc.forsale anymore... In article <13347@polyslo.CalPoly.EDU> dorourke@polyslo.CalPoly.EDU (David M. O'Rourke) writes: >adam@mit-amt.MEDIA.MIT.EDU (Adam Glass) writes: >>You're quite wrong. Mac II series computers will work just fine with 150ns >>SIMM chips. For all normal use, there is no apparent slow down at all. In [David's paragraph about Apple replacing "slow" SIMMS as a fix deleted] > Perhaps some hardware type on the net could explain why the 020 and 030 >in Apple's products require 120ns or better chips. Sorry, not quite a Mac hardware type yet... [.signature deleted] Chip manufacturers are conservative. They want 100% (or some number extermely close to this) of there chips to work at least as well as marked. In other words, a chip rated to 12MHz will often perform just fine at up to 16MHz (or higher if you are willing to hand pick). Testing is expensive in large quantities, apparently far more so than overly?-conservative speed ratings. 100% of all SIMMs rated for 150 ns will respond in at most 150 ns with valid output. This does not imply that they will respond in precisely 150ns, just before that. The DRAMs might be driving the output lines 30-50ns faster than that so the manufacturer gets the desired 100% yield. While not all 150ns SIMMs will work in a Mac II (I believe), quite a few if not most might. David is right when he says that Apple will replace the "too slow" SIMMs before anything else. Adam is right in saying many 150ns SIMMs will work in Mac IIs. hal@media-lab.media.mit.edu DarthVader@movies.mit.edu And may the Dark Side be with you No one would be foolish enough to claim any of my opinions, and they certainly are not expressive of my employers...
cjp@Apple.COM (Chris Plummer) (08/10/89)
In article <19285@vax5.CIT.CORNELL.EDU> z8my@vax5.cit.cornell.edu (Samuel Paik) writes: >In article <39816@sgi.SGI.COM> grego@darkeyes.sgi.com (Greg Orsini) writes: >>> >>>>>>>>>>> 256K SIMMs <<<<<<<<<<<<< >> >>> - taken out of working Macs for upgrades >>> - 150ns > ^^^ >>> - large qty available >>> - price too high??? let me know what you think. >>> > >What use does anyone have for these? The only useful place for 256K SIMMS >is in Mac II/IIx/IIcx/SEx computers, but they require at least 120ns! > >Sam Paik I've used 150's in both a Mac II and a IIx without any problems. It depends on the dram chips I guess. Just becuase they say 150 on them doesn't mean they really are that slow. Of course I've only tried this with a few SIMMS. I'm not sure what percentage are usable on a Mac II or faster CPU. Chris Plummer AppleLink: PLUMMER1 Communications Product Development internet: cjp@Apple.com Apple Computer, Inc. UUCP: {amdahl,decwrl,sun,unisoft}!apple!cjp