From owner-freebsd-hardware Wed Aug 27 21:13:22 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id VAA05560 for hardware-outgoing; Wed, 27 Aug 1997 21:13:22 -0700 (PDT) Received: from tok.qiv.com ([204.214.141.211]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id VAA05553 for ; Wed, 27 Aug 1997 21:13:17 -0700 (PDT) Received: (from uucp@localhost) by tok.qiv.com (8.8.6/8.8.5) with UUCP id XAA19934; Wed, 27 Aug 1997 23:13:02 -0500 (CDT) Received: from localhost (jdn@localhost) by acp.qiv.com (8.8.6/8.8.5) with SMTP id XAA01054; Wed, 27 Aug 1997 23:07:13 -0500 (CDT) X-Authentication-Warning: acp.qiv.com: jdn owned process doing -bs Date: Wed, 27 Aug 1997 23:07:13 -0500 (CDT) From: "Jay D. Nelson" To: Howard Lew cc: hardware@FreeBSD.ORG Subject: Q: K5 clock speeds (Was: Re: K6-200 Has anyone ...) In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hardware@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk Thanks for the info. What you are suggesting is that the clock is the only thing that counts and moving the jumper to x2.5 is all that's necessary -- regardless of the bios. Why would ASUS issue a bios upgrade to support 150-166Mhz K5s? (Marketing?) -- Jay On Wed, 27 Aug 1997, Howard Lew wrote: >On Wed, 27 Aug 1997, Jay D. Nelson wrote: > >> Did you upgrade the bios to support the chip? I just installed this >> board with a K5-166 -- clocked it at 66Mhz*2 because I wasn't sure. >> Works fine at 133Mhz though the bios thinks it's 100Mhz. I'm about to >> upgrade the bios but would rather not. Why wouldn't 66Mhz*2.5 work as >> well? My bios right now is *-0109. Is there anything peculiar about >> K5s above 133Mhz? >> > >When you clock a K5-166 at 66x2 you are slowing it down to K5-133 speed >because the K5-133 runs at 100MHz. The K5-166 should be jumpered for >166MHz like a Pentium (66 x 2.5). The circuits inside the chip will >modify it to 1.75. > >The only way to overclock a K5 is to use a higher bus clock (i.e. 75MHz) >because of the way the clock multiplier on the K5 works. 75MHz will >generally work, but 83MHz will not. At 75MHz bus clock, the K5-166 will >be probed and run at or almost at Pentium 200 speeds. Stability is >questionable though and depending on whether your MB supports async PCI, >37.5MHz may be too high for some PCI SCSI cards. > > >> -- Jay >> >> On Wed, 27 Aug 1997, Cameron Slye wrote: >> >> >> >> >> I've only a 166 MHz but I've made several "make world" without problems. >> > >> >How much memory is in that box ? I have a asus p55t2p4 here, with a 166 in >> >it. 25 make worlds finished with only 32mb in 2 slots, but with 64mb in 4 >> >slots, it died in the first make world. (sig 11) >> > >>