Date: Mon, 14 Jul 1997 23:51:08 -0700 (PDT) From: Howard Lew <hlew@www2.shoppersnet.com> To: "Jin Guojun[ITG]" <jin@george.lbl.gov> Cc: dg@root.com, drussell@saturn-tech.com, FreeBSD-hardware@FreeBSD.ORG, brett@lariat.org, jkh@time.cdrom.com, jwm@CSUA.Berkeley.EDU, root@meeko.eecs.Berkeley.EDU Subject: Re: AMD K6 Message-ID: <Pine.BSF.3.91.970714234437.16409D-100000@www2.shoppersnet.com> In-Reply-To: <199707141539.IAA11025@george.lbl.gov>
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On Mon, 14 Jul 1997, Jin Guojun[ITG] wrote: > I cat two messages together to respond since I missed most time last weekend. > I did not see any one give more clear spce. > First of all, I have AMD K6-166, bought when it just born, and have overclocked > to 200 MHz, and so far it has no problem at all. I have post the result of > its performance on "Hardware performance guide for Pentium family" under > http://www-itg.lbl.gov/ISS/hardware > > The Cyrix 6x86, some one has tested, is little bit faster and much cheaper, > but less compatiability. It DOES not work on most moatherboard, I was told. > > The ADM K6, generally, works on most new motherboards. The key is that it has > to be HX or TX PCI chipset based motherboard. If you use other PCI chipset, > such as VX, it is not guaranted to work. > The ASUS PCI-P/I-P55TVP4 is the bottum line, and ASUS TX97 is very reliable one. > > No big suprise. These motherboard is about $140-$155 in the past. Uauslly, > the price should be dropped, but it seems goes up by $5 this time. > I wonder it is the reason for K6 compatiability. > > I doubt those $80 motherboard can work for K6. I've got one for around $80 wholesale that works. Not as fast as the TX or HX though, but it does support 384MB memory. It uses the VXpro chipset (VIA VP1) and has 75MHz & 83MHz jumpers as well as a switching Voltage Regulator. Now the computer is much cooler inside without that linear VR. > > -Jin > > }> I ma currently test driving an AMD K6/200 in a > }> FIC PA-2005 motherboard and I am getting a lot of crashes. > }> (actually it looks like a reset, no cores, no console messages > }> just a spontaneous reboot). I am wondering if anyone has seen > }> the K6 do similar things. The vendor says "The K6 does support > }> UNIX", but I am inclined to believe that he doesn't have a clue. > }> I am thinking I will return the K6 and get a Cyrix M2, any thoughts? > } > }We've been totally unable to get the K6 to work reliably, nor have any > }of the folks we've been talking to had much luck - the symptoms are > }basically the same in each case, signal 11s all over the place and > }make world failures. What's weirder is that it will often work just > }fine for days or weeks, the initial make world tests going fine, and > }then it will just stop, no make world making it through from that > }point on. I'd never seen a CPU fail due to heat death, but it sure > }seems like the only explanation here. What's more worrisome is that > }the other 4 testers had exactly the same thing happen. > } > ----- another message ------- > } > }Anyway, FreeBSD, Inc. now owns an expensive piece of chip jewelry from > }AMD since our 30 day return period also elapsed during testing. :( > } > }>> Have you tried the obvious controlled experiment: putting a Pentium into > }>> the same motherboard? > }> > }>The problem is that there are still too many variables. The K6 and a > }>plain Pentium use different voltages, etc. My best guess would be to try > }>running the thing at a different voltage. Several people have said they > }>had to up the voltage a little to overclock the chip. We might try > }>bumping the voltage by .1 or .2 volts and see what happens. Checking > }>cooling never hurts, either. > } > } Did that, no difference. I also changed the motherboard to a different > }kind...no difference. > --------------------------------------------------------------------------- Shoppers Network (Support) AMD K5/K6s, Cyrix 6x86, Intel Pentiums/Pro Phone: (415) 759-8584 Email: howard@shoppersnet.com ==============================> WWW - http://www.shoppersnet.com ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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