Ok, NVR...

Theres definitely more left in the CPU if u got it that high...HOWEVER...

That PDC-K ram is what is holding u back, the PSU is perfectly fine...

u have to step down the ram divider...its set right now to run at 200Mhz Mem clock...Thats A-Synchronous to the FSB...

The 2600+ is 166Mhz or 333DDR stock...ur at 186 or 372 ddr...that means the ram is running at 220 or 440ddr...and that ram simply can NOT clock that high...
Set the memory divider to 6:6 and decrease ur multiplier from 12.5 to say, 11.

NOW push the FSB to 200Mhz. that will give 2200Mhz (Yes, less than what u have now, but this is a startign point)

Remember, FSB Bandwidth is MUCH more important and beneficial than over MHz is on an Athlon. so the bigger the pipe, the better.

Now it should be 100% stable at 2200mhz @ 400DDR...now increase the multiplier 1 step at a time, so try 11.5, if u see any instability, go back into the bios and raise the voltage an extra notch. As long as u havent surpased 2.2VCore, ur fine.

Yes, i said 2.2VCore.

Your running a T-Bred 'B' CPU...i have a 1700+ T-Bred 'B' @ 2.1VCore on a TT Volcano 7+ Heatsink with a 80mm TT Volcano 7 fan mounted to it @ 2.25Ghz 100% stable, doesnt even run hot, hottest i seen was 49degrees full load. The CPU has more in it, but the MB its on is a shitty VIA KT400 (not KT400A) based gigabyte board, so 200Mhz FSB isnt even supported but meah...

Try it out man, those NF7-S's r the best Socket A boards ever made.

-Jay