Joe, Re: "I think he said he had 1.8 GHz. So to get to 2.3 GHz, he needs to overclock the FSB and memory by 28%, which can become iffy, even if the CPU is fine. Or it could be the CPU. I think the days of 50% overclock (like the first Celerons) are over."
You are correct. 28% is a lot to push on a motherboard, with so many common clock domains all based off the same source. Sure, you can now adjust PCI and AGP separately, as well as many other separate adjustments, but God knows how many other sensitive clocks are running out of spec when you crank up that front side bus....
At least in the days of Celeron, you were overclocking the board from 67MHz to 100MHz, and that usually had a lot of headroom. These days, board electricals haven't improved all that much, but logic is getting a helluva lot faster. In that respect, 50% overclocks are going to be rare, if at all possible, unless you are willing to live with a few instabilities like STR not working.
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