Date: Tue, 27 Oct 1998 14:40:30 -0500 From: Seth Leigh <seth@pengar.com> To: "Christopher G. Petrilli" <petrilli@amber.org> Cc: freebsd-smp@FreeBSD.ORG Subject: Re: Intel PR440FX Message-ID: <3.0.5.32.19981027144030.00817770@hobbiton.shire.net> In-Reply-To: <19981026160234.20358@amber.org> References: <3.0.5.32.19981026165905.00800180@hobbiton.shire.net> <3.0.6.32.19981023205759.007a0750@softhome.net> <3.0.6.32.19981023205759.007a0750@softhome.net> <19981023095621.12441@amber.org> <3.0.5.32.19981026165905.00800180@hobbiton.shire.net>
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OK, OK, You dragged it out of me. ;-) I can't remember what the jumpers are to switch the bus speed between 60 and 66 MHz. I don't know where my handbook is, so I can't look it up (I think Intel has the handbook in .pdf format on the web somewhere, just search for PR440FX on their website). For me, only 66 MHz is interesting. For 66 MHz bus speed, the speeds available are 133, 166, 200, 233. In other words, 2x, 2.5x, 3x, 3.5x multipliers. These multipliers are changed by changing the two jumpers at the front bottom corner (next to the mobo battery, ie: the main jumper block). The two multiplier jumpers are the ones closest to the front of the computer. Here is what I know of the settings. There are three pins for each jumper, which only (of course) joins two of them. . . . --- 2x ---------> front of computer, away from cpus . . . --- . . . --- 2.5x . . . --- . . . --- 3x . . . --- . . . --- 3.5x . . . --- I am using the 66 MHz bus, and am currently using 3x multiplier for 200 MHz, and have been doing so for months with my 180s. For this email, I tried out all the settings again to make sure I remembered them correctly, and as I am writing this email I am running at 3.5x66MHz for 233 MHz in Windows98. I don't want to run that for very long before I get my big heatsinks. I haven't tried running NT on this machine at 233 MHz. I did try FreeBSD-SMP with both processors at 233 MHz several months ago, and it didn't work. The first cpu would work, but when the second processor tried to come on line the machine would lock up. Hopefully, when I get my jumbo heatsinks the chips will both be cool enough to run stably at 233 MHz in FreeBSD-SMP and NT. Seth At 04:02 PM 10/26/98 -0500, you wrote: >So what's the secret for 233Mhz? :-) > >Chris > >On Mon, Oct 26, 1998 at 04:59:05PM -0500, Seth Leigh wrote: >> Christopher, >> At www.sdsmark.com there are these massive heatsinks called Titan P6T or >> something like that that the guy will sell you with 23 cfm fans for $17 or >> so. I am awaiting mine in the mail. I am currently overclocking my two >> PPro 180s to 200 MHz, and as soon as the new heatsinks come in, I am going >> to 233 MHz with my PR440FX motherboard. The mobo handbook doesn't tell you >> how to get to 233, but I figured it out one day, but didn't dare run at the >> speed with my crappy heatsinks. There is another FreeBSDer whose name I >> can't recall at the moment who is running dual 166/512 like yours at 233 >> MHz (with the Titan heatsinks that I ordered), and has been doing so >> problem-free for something like 8 months. >> >> Seth Leigh >> >> At 09:56 AM 10/23/98 -0400, you wrote: >> >On Fri, Oct 23, 1998 at 08:57:59PM +0800, beav wrote: >> >> I was just wondering if anyone still uses Intel PR440FX boards? And also, >> >> do PPro 180's clock to 200 and/or 233? >> > >> >I do, love myt board, and got a pair of PP166/512K for almost free. >> >They are currently overclocked to 200Mhz without even the slightest hint >> >of problems. HOWEVER, I have huge heatsinks and fans on all my machines >> >(I can provide a source if you want) that are a bit pricey ($30-40 each) >> >to keep them cool. >> > >> >Chris >> >-- >> >| Christopher Petrilli >> >| petrilli@amber.org >> > >> >To Unsubscribe: send mail to majordomo@FreeBSD.org >> >with "unsubscribe freebsd-smp" in the body of the message >> > >> > >> > >-- >| Christopher Petrilli >| petrilli@amber.org > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message
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