Path: utzoo!censor!geac!torsqnt!news-server.csri.toronto.edu!rutgers!usc!wuarchive!uunet!visix!amanda From: amanda@visix.com (Amanda Walker) Newsgroups: comp.sys.mac.hardware Subject: Re: SIMMs for IIsi - what do I need? Message-ID: Date: 18 Dec 90 19:14:05 GMT References: <1CE00001.0b2um2@tbomb.ice.com> Organization: Visix Software Inc., Reston, VA Lines: 20 In article hamilton@kickapoo.cs.iastate.edu (Jon Hamilton) writes: >time@tbomb.ice.com (Tim Endres) writes: >>Am I missing something here? Different speed SIMMs have different >>socket dimensions, right? > >Wrong. The //fx SIMMs are different beasts than the rest of the Mac line >uses. Different speeds of the same kind of SIMM all have the same socket >size. In particular, I believe that the IIfx uses "static column" memory, which when combined with the 68030's burst mode, ekes out some extra performance from a given basic speed of memory, at the cost of requiring extra support circuitry. -- Amanda Walker amanda@visix.com Visix Software Inc. ...!uunet!visix!amanda -- If you know what you're doing, how long it will take, or how much it will cost, it isn't research.