Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!spool.mu.edu!cs.umn.edu!ianhogg From: ianhogg@cs.umn.edu (Ian J. Hogg) Newsgroups: comp.sys.ibm.pc.hardware Subject: Re: Different speed math co-processor Message-ID: <1991Jun21.012433.4327@cs.umn.edu> Date: 21 Jun 91 01:24:33 GMT References: Distribution: comp Organization: University of Minnesota, Minneapolis, CSci dept. Lines: 25 In article pshuang@athena.mit.edu (Ping-Shun Huang) writes: >I would like to know if you can use a 80387 which is a different speed >than the i386 CPU on the same motherboard. I seem to recall reading >something in the past about there being a separate crystal and that >therefore the 8038_ family was the first where you could mix and match >different speeds. Does anyone know the technical details or have tried >this and either failed or succeeded? > I've been running a 20Mhz 387 in a 33 Mhz 386 system since February with no known problems. I don't know if it is "officially" OK to do this though. >(The reason I wish to know is that as a student on a tight budget, I >would be willing to buy a 80386-16 rather than a 80386-33 even though I >would be taking a hit on FLOPS if I can get a substantially better price.) > >-- >Above text where applicable is (c) Copyleft 1991, all rights deserved by: >UNIX:/etc/ping instantiated (Ping Huang) [INTERNET: pshuang@athena.mit.edu] -- =============================================================================== Ian Hogg ianhogg@cs.umn.edu (612) 225-1401