I bought parts awhile ago for my lombard, 2 of the parts were a 400mhz processor and a lombard motherboard with the dvd chip, i have installed the mobo with the dvd chip and it works fine with any of the 333mhz processor cards i have but if i put the 400mhz one in, it freezes after about 20-30 minutes of run time. The processor card doesnt usually seem that hot by the time it freezes. the power book runs os x, and os 9 it usually happens earlier while running X than it does with 9. Can i fix it, i'd like to have that speed boost.
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just as a note my 333mhz card seems to get much hotter than the 400mhz one but no freezing. i also did not do a new install when i put in the new motherboard, i just use the same one i used with the previous motherboard.
The most likely story - 400 has a bad L2 cache. IIRC, daystar can replace the L2 for ~US$100.
I've overclocked a couple of 333 Lombard CPUs to 400, give that a try for a lil' speed boost.
dan k
but when i am able to get it to boot up it recognizes 1mb of l2 cache.
When the L2 is being naughty, it proclaims itself OK, but when push comes to shove, it behaves badly.
Try using an L2 cache enabler to disable the L2, then see if it still acts up.
dan k
bad lc cache...looks like time to replace the processer daughter board
could it be bad ram?
Yeah, I think it is bad RAM. Actually, I had a similar problem with freezeups in my G4 tower earlier today, and it turned out be a bad RAM module (should have seen it coming, the RAM had no labels and the chips were no-name). Also (I could definitely be wrong here), but is the FSB on the 400 MHz 100 MHz instead of the 333's 66? That would explain it too (RAM too slow).
You say that the 333 gets much hotter than the 400, which is strange... usually if a processor heatsink is cool, it means one of two things:
1) The thermal conductivity is excellent, processor is running cool
2) The thermal conductivity is terrible, processor is running very hot
Are you using the same heatsink for both?
i checked the ram and it's fine but it still freezes i downloaded a temperture monitor though and it shows that the 400mhz cpu's temp gets pretty just before it freezes much higher than the 333mhz
Are you using the same heatsink on both of these processors?
there really isnt a heatsink just these things http://www.ifixit.com/Guide/31.5.2.html
the white stuff on the 400mhz processor is a little messed up so that it may not be touching the metal. is there anything else that could cause overheating like that?