I am not sure whether the KR7A supports larger PCI/AGP dividers (like 5 or 6 for PCI) or decouples the PCI/AGP clock from the FSB. If it does you an very well lock your AGP to 66 MHz. or even use a higher divider to keep it between 66~90 MHz. If you have a good card, it will run quite fine even at this high speeds.
If you arent getting any problems at 185 (DDR370) you might push harder by increasing the voltage a bit. As for the AGP and PCI speeds, if the board supports higher dividers, go for it, else they may well prove to be the bottlenecks in FSB overclocking!
Then you will have to resort to multipliers but it wont probabely work since the half multiplier will increase the speed by 92 MHz which is way too high an increment! If you can do it, try using both combinations, to acheive the processor's max core speed you've determined. For example, lets say your XP1600+ (1.4 GHz) maxed out at 1.65 GHz (~XP2000+) at a FSB of 195 MHz with a multiplier of 8.5! And further, neither increasing FSB is possible, nor the multiplier since it wil throw the processor up by straight 97 MHz wich is almost XP150! Right now, you are around the limits of your processor, you can perhaps still get about 50 MHz of overclock by you wont since its cannot be set. Least you can set is 97 MHz! If possible, get some benchmarks of this combination.
Now, try to get the same clock speed by increasing the multiplier to 9, and reducing the FSB to 184 MHz. Again get the benchmarks and try it with (9.5x175) and (10x165)
As I said earlier, in between this, there is the best combination of (multiplier x FSB) that will give you optimum performance. Compare the benchmark results and decide for yourself.
I know its tedious, but its the only way to find out. Higher FSBs reduce the granularity of core speed increments, at times to such levels that you cannot know about potential MHz still left in that processor, since you simply jump past it. Its high time they provided multiplier in quarters! ;-)
girish
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