All that was done was the frequency was taken from 1.25 to 1.5GHz, and the voltage was taken from 1.55 to 1.85V
That is WAAAAAAAAY too much for your card. You may have fried it... Try setting it back to 1.55V if you can. Vcore adjustments aren't necessary until you've tested it and found instabilities. I only needed to bump a 7447B up .050V from 1.325V to make the 1.92GHz clock stable.
I set it back to 1.6 and it did the same exact thing. I think I killed it
I was actually going to send it back to the person I sent it to who overclocked it in the first place because he’s getting a hot air station to see if he can fix it, because I have a backup plan if the fix goes awry: I’ll buy either a gigabit graphite G4 or an actual 1.5GHz MDD
Well if you're looking for dual CPU macs and are in a real treat for restoration, there's a Dual 1GHz QuickSilver G4 on eBay that's been exposed to the elements long-term... haha
I was going off of a video by dosdude1 where he took an 867MHz MDD, replaced the CPUs with 7457s, and overclocked it to 1.5GHz, and I was sure I could do the same with my 1.25, which had 7455s, but as I said, overvoltage killed itThe thing is about overclocking, you have to look for a good source. It takes a few tries to find one that's reputable, and if I'm correct the House of Moth has a good page on it. Some people claim to reach certain speeds with exceedingly high vcores, and all that is BS. I remember seeing someone overclock their USB 2.0 eMac to 2.08GHz, and they even had a geekbench for it. However, I was unable to replicate that clock on various eMac motherboards. It's proof and results that count; it's best if you see people achieve the same overclock as the original poster did.
It's nothing to be ashamed of. It requires a lot of experience, trial, and error. I've messed up some known good systems before, and the experience I got from those moments helped me to make the tweaks successful. No hard feelings.
I did also use the house of moth's website, which dosdude had in his description, although it didn't say what voltage to use for 1.5GHz, so I overestimated and fried it
I learned that the hard way, now I have it set to 1.6V and I have since sent it out to the guy who did the overclock in the first place to have them replace the 7455s with either more 7455s or 7457s, whichever is cheaper on eBay
ah, so I'm stuck with 1.25. I was trying to scale it to 1.5 (with a copper heatsink from a 1.5) so that I can use DiscordPPC at a decent speed
