Overclock cpu Socket A

We started by first increasing the core voltage to 1.70v, which only required one modification, then later moved up to 1.80v, which required a second modification and finally 1.85v, which forced us to connect all of the “Golden Bridges” present at L7.

In spite of all of this, our Duron 700, running at 1.70v and finally at 1.85v would not overclock past 700MHz. We could easily underclock it to 600 and 650MHz but even running it at 750MHz was out of the question. This anomaly was present even with our 800MHz and 1GHz Thunderbird parts, the 800 wouldn't boot at any clock speeds faster than 800MHz and the 1GHz part that we ran at 105MHz x 10.0 (1050MHz) wouldn't boot at 100MHz x 10.5 (1050MHz).

The only explanation we could come up with for this was that somehow the clock multiplier was being limited by the original clock multiplier of the CPU. For example, the Duron 700's "Golden Bridges" indicated a 7.0x clock multiplier and while it would work with 6.0x and 6.5x multipliers anything higher than 7.0x wouldn't work. The same situation existed with the two Thunderbirds we tested.

Since we have such a small sample size we can't say anything definite about the status of clock multipliers on all CPUs, we purchased a few retail chips and will test those as soon they come in and report on our findings.

While we are aware that manipulating the "Golden Bridges" that correspond to the FID and BFID pins on the CPU we have yet to successfully find a tool that can be used to cut a connected "Golden Bridge." We will continue to experiment with this as well.