Article View: comp.sys.intel
Article #138Re: 486sx questions
From: Dennis O'Connor
Date: Thu, 30 Jul 1992 20:01
Date: Thu, 30 Jul 1992 20:01
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ifaq570@ccwf.cc.utexas.edu (Allen Kitchen) writes: ] Sorry bud, but to upgrade from the 486SX to the 486DX, you will ] need to buy an entire new motherboard. Reason for this is that the SX is ] a 16 bit memory bus, just like the 386. The DX is a 32 bit part, meaning ] the memory is set up to be 32 bits wide. ARG ! NO NO NO ! Both the Intel486(tm) SX and DX have 32-bit external busses. The Intel486 DX has an FPU, the Intel486 SX does not. And the pinouts are a tiny bit different. If your 486SX board has the right stuff ( either a "Vacancy" socket or signal-routing jumpers ) you can upgrade it to an Overdrive processor ( equivalent to a clock-doubled 486DX ), or maybe to a DX. In contrast, I think the Cyrix "486" part has only a 16-bit bus. -- Dennis O'Connor doconnor@sedona.intel.com
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Path: arc1-ca.pugleaf.net!sparky!uunet!iWarp.intel.com|inews!doconnor From: doconnor@sedona.intel.com (Dennis O'Connor) Newsgroups: comp.sys.intel Subject: Re: 486sx questions Message-ID: <DOCONNOR.92Jul30130104@potato.sedona.intel.com> Date: 30 Jul 92 20:01:04 GMT References: <1992Jul27.135047.13578@nstn.ns.ca> <76814@ut-emx.uucp> Sender: news@inews.intel.com Organization: Intel i960(tm) Architecture Lines: 21 In-reply-to: ifaq570@ccwf.cc.utexas.edu's message of 30 Jul 92 18:15:27 GMT