Messages in this thread | | | Date | Sat, 18 Dec 1999 13:51:38 -0500 | From | Ted Sikora <> | Subject | Re: [Fwd: Dual Celery on BP6] |
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Mike Frisch wrote: > > On Fri, 17 Dec 1999, Harold Oga wrote: > > > One thing I noticed on my BP6 system with dual 400's was that with a 250W > > power supply I would get lots of APIC errors even at 66MHz and my I/O voltage > > would fluctuate as much as 15%. Once I replaced it with a 300W power supply, > > the voltage smoothed out, and I noticed that I rarely, if ever get APIC errors > > at 66MHz anymore. Another thing to consider anyways. > > I am now hearing similar things with respect to power supply issues. Is > it possible that the larger power supply is providing cleaner power which > is improving the situation. While I have not checked the actual power > usage requirements of the BP6 with it running two CPUs at 100MHz FSB, I > have a difficult time believing that (A) the combination needs more than a > 250W power supply in the average machine, and (B) an increase of a mere > 50W improves the situation. > > Unfortunately, I am not an expert on motherboard design, nor on SMP in > general. I do not have the facilities to test or confirm any of these > findings. I have left that to others, but it appears they're a rare > breed. It sure would be nice if ABit could do something to help us out > and answer some questions. > > All I know is that I started to worry when I first noticed these APIC > error messages in the log in 2.3.18 (or thereabouts). > Last night I went through all the bus speeds up to 94 to see when and how often the messages appear.((my case has extra cooling +300w ps)I was not aware of them till I read about them on the list.)) My setup is 2x400 Celerons with BP6NJ bios. Up to a bus speed of 82 I had absolutelly no errors then they started at 83 sporadiclly becoming commonplace at 94Mhz My cpus seemed to work fine up to that point so I cut the test off there. I would have to conclude cooling + ps size and overclocking are all a factor in this. At normal speeds up to 75Hmz with adequate cooling I don't see this as being a problem. The reason I aborted at 94Mhz is that any voltage change above 2.05v saw the temperature rise dramaticlly(over 100 degrees)so for all pratical purposes I would say I was at the chips limit.
Conclusion: Errors are hardware related.
-- Ted Sikora Jtl Development Group tsikora@powerusersbbs.com http://powerusersbbs.com
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