🚀 go-pugleaf

I've got an Ultra 60 that originally came with 256 MB of RAM.  I upgraded
it to 512 MB of RAM by taking 4 x 64 MB DIMMs from two Ultra 1s.

I've now had 3 kernel panics in 24 hours since putting the Ultra 1 DIMMs  
in my Ultra 60.  The Ultra 60 had been rock solid for 6 months under
moderately heavy loads prior to installing this RAM.

Is the RAM used in Ultra 1s not compatible with the RAM needed for an 
Ultra 60?  I was under the impression that they used the same type of
memory.  Does the Ultra 60 run its RAM at a higher clock frequency or
something like that?  The system clock frequency in the Ultra 1s is 72 Mhz
whereas the system clock frequency is 120 Mhz in the Ultra 60.  The Ultra
1s were never placed under much of a load, but they also never had a
kernel panic.

I should also mention that the DIMMs I took out of the Ultra 1s were
aftermarket memory, not Sun labeled/authorized memory.

Thanks for your help.

-- 
Jason Kau
Georgia Tech Research Institute
jason.kau@gtri.gatech.edu