VAXstation/MicroVAX 2000 CPU/FPU overheating?

[Göran Axelsson]

Maybe a stupid solution, but couldn't the over heating be solved by 
lowering the clock... if possible?

My theory after following this thread is that the overheating was caused 
by a once borderline processor running too hot for too long causing 
migration of dopants in the transistors and increasing the static power 
drain.

I once had a x86 server that I overclocked for a year (calculating prime 
numbers) running at full load until it started to become erratic. It was 
rock solid for a year and then I lowered the frequency to the marked 
frequency and five years later it was still running rock solid.
I finally had to upgrade when I was /. by Ericsson after my web address 
was publicised on the intranet of Ericsson on a friday afternoon. Load 
was at 35 and rising fast. :-D

Good luck!

/Göran

der Mouse wrote:
>>> Is the [uV2k] FPU socketed?
>>>       
>
>   
>> It's soldered down and not removeable with out the right tools for
>> handling high lead count surface mount.
>>     
>
>   
>> Me I'd pull a old MVII cpu card and do the remove and replace of the
>> FPU and CPU.  MicroVAXIIs with good cpus and FPU and bad Qbus
>> interfaces are not uncommon.
>>     
>
> The uVII and the uV2k use identical FPU and CPU chips, even down to the
> packaging?  That's definitely a tidbit worth remembering.
>
> I don't think I have a suitable uV2 donor card just now, though. :(
>
> /~\ The ASCII				der Mouse
> \ / Ribbon Campaign
>  X  Against HTML	       mouse at rodents.montreal.qc.ca
> / \ Email!	     7D C8 61 52 5D E7 2D 39  4E F1 31 3E E8 B3 27 4B
>
>