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No L3 after over-clocking QS?

128keaton

128keaton

macrumors 68020
Original poster
Jan 13, 2013
2,029
419
Do you have OS 9 installed by chance? I had a dual 1.0 QS that had a failed L3 cache and during the boot, OS 9 will actually tell you it discovered the failed cache. Obviously it would still run, but that lack of cache was certainly noticeable. I don't know if this was a common problem with QS CPUs, but its the only PowerMac I've seen this happen on.
 
I cant help you on this one. When I first got my QS it came upgraded with a 1.2Ghz Sonnet (single) that has cache.

However, I've had two 17" PowerBook G4s with failed cache before (one of the reasons MR now has a TenFourFox tweaks/addons thread), both of which continued to function for years.

Is it possible that in your overclocking you damaged a trace or something, or one of the cache chips?
 
eyoungren said:
I cant help you on this one. When I first got my QS it came upgraded with a 1.2Ghz Sonnet (single) that has cache.

However, I've had two 17" PowerBook G4s with failed cache before (one of the reasons MR now has a TenFourFox tweaks/addons thread), both of which continued to function for years.

Is it possible that in your overclocking you damaged a trace or something, or one of the cache chips?
Click to expand...
Potentially. Thats the only logical explanation. But yes, look at the score with L3 and compare without. Huge difference.
 
So is that first picture showing the 933 daughtercard running with L3 cache in the 733 QS? Or was that back when it was still in your 933 QS before it died?
 
Xandros said:
So is that first picture showing the 933 daughtercard running with L3 cache in the 733 QS? Or was that back when it was still in your 933 QS before it died?
Click to expand...
When it was in the 733 QS. The 933 QS never booted, I have a thread around here of me trying to revive it. I just tried again today for kicks.
As a note, I got my MDD overclocked successfully. Its close to breaking 1000 on GeekBench. A dual 867 - > dual 1Ghz with a system bus unlock. If anyone wants to add to the overclocking guide on the wiki, feel free to.
 
That is weird. On CPUs I've overclocked too far they wouldn't boot, or would crash pretty quickly. Powerlogix CPU Director can let you set the cache speed, and there was a CPU preference pane with apple CHUD that would let you enable/disable cache.

I guess you could set it back to 933 and see if the cache comes back?
 
flyrod said:
That is weird. On CPUs I've overclocked too far they wouldn't boot, or would crash pretty quickly. Powerlogix CPU Director can let you set the cache speed, and there was a CPU preference pane with apple CHUD that would let you enable/disable cache.

I guess you could set it back to 933 and see if the cache comes back?
Click to expand...
Potentially. I'll see what happens.
 
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