Heat or Voltage?

[spdsk8r]

I just got my C466 today and I'm burning it in now at 525 / 2.05V (It's stable at 1.95V) I can't get 581Mhz though!

At 2.1V it freezes when it says "loading Windows 95"

At 2.2V it freezes just after getting into windows.

At 2.3V it freezes after about 5 min. of use with the D.net client running.

Should I try 2.4V? I'm kind of scared it will get too hot... It's almost too hot to touch at 2.3V

[Dominus]

I'd say 2.3v is your safe limit.
if it gets that hot at 2.3, then 2.4 will probably damage it.

[spdsk8r]

If I got better cooling (peltier or alpha) do you think I would be able to reach 581?

[Roy]

In general, 10% boost is safe, 15% OK and 20% on the edge. Better cooling is the key to longer life and usually allows faster speeds.

With MoBoMonitor 4.07 reading the thermal diode inside my PII450 I have found that the temperature varies by 10*F between 300MHz and 527MHz with the system idling and at the same voltage (+10%).

I'm in the process of getting a very large heatsink to move forward with aggressive Peltier cooling using four TEC plates. When I used them with my basic dual fan HS, it got so hot I could smell the anodized paint burning off and only lowered the CPU temp by 3-4*F. I need to remove more heat.

[spdsk8r]

I just added another fan and I'm able to run it at 525Mhz / 1.7V stable I still can't seem to be able to reach 583Mhz though - I had it running for about an hour at 583 / 2.2V but eventually it got too hot and froze. 2.3V didn't work either, infact, it was less stable.

Any suggestions? I really want to reach 583!!! Do you think it's because of heat or is it the voltage??

[This message has been edited by spdsk8r (edited 06-18-99).]

[rockinwy]

I would say heat my 400a wouldnt get 500 at any voltage same as yours, until I got the temp down. Now it runs stable at 500 2.05 volts.

[LJE2]

It could be your hard drive or some PCI card @ 83 MHz your PCI bus is running at 41.5 MHz, this is a big jump for some components and they just can't function properly, What type of modem do you have (internal, ext. PCI or ISA) alot of PCI modems don't function at this bus speed, also some people have had better luck running this FSB by disabling DMA for there hard drive.

[spdsk8r]

I know it has nothing to do with the PCI bus... I had a C366 just before this that ran at 458Mhz (5.5X83) for months stable!

I'm thinking it might be the heat - I'm going to try to get a thermal sensor.