Ok, heres the thing, I have had my 4200+ overclocked for some time at 2.4GHz and it seems to be running fine, but the problem is now I put the FSB/CPU Frequency whatever to 225 and Prime95 gives me a rounding error, 0.5 expected less then 0.4 or whatever, so I turn the RAM thingy down to 200Mhz thinking its because the RAM was overclocked almost over 300Mhz but that doesn't help, so now I'm thinking its the RAM timings, and I'm not even sure what to do there. Also, I have put up the voltage on the CPU a little to 1.4, now since that didn't work I put it back down but now I'm at a loss as to what could be the problem, can anyone lead me in the right direction? I'm pretty sure its the Memory timings...

Some CPUs can't overclock beyond a certain point well, depending on the stepping version or the actual CPU itself. Some dual core CPU's cores will clock higher than the other. Others may have better luck with expensive mobos($150+).

But.. the CPU seems fine.. and Prime95 gets an error less then a minute in.. and I've heard thats indicating a memory problem.

Loosen the timings and tell us how it goes.

You have told us very little about how you've attempted the overclock. A very common overclock for an A64 or A64 X2 system would be to lower the HT multi from 5x (1000MHz) to 4x (800MHz), raise the CPU freq from 200MHz to 250MHz, lower the RAM freq from 200MHz (DDR400) to 166MHz (DDR333), disable Cool 'n Quiet, disable any Spread Spectrum settings, lock the PCI-e at 100MHz, lock the PCI at 33MHz, & increase the CPU voltage only if necessary. Memory timings depend on the RAM, but 2.5-3-3-7 @ 1T command rate *should* work well. Test you RAM with memtest86...if errors are reported, change the command rate to 2T & run memtest86 again.

Overclock guides like this are easy accessible on the internet & could help you greatly - if you are not very familiar with the exercise. What type (brand) of PC3200 memory is it, I would assume even value RAM of that speed should be able to pull off 225MHz easily. As jam stated, make sure you've locked the buses at their appropriate frequency. The other things is, did you just arbitrarily ramp up the CPU clock to 225MHz? If you did, that could very well be part of your problem, you gotta do this incrementally - I normally do 2-3MHz at a time & back down 1MHz anytime I hit the wall. You definitely do not overclock that way. Once you've dropped the HT to 4X, you should also drop the CPU multiplier to either 9X or 10X since your CPU multiplier is only locked going up & not down. If you have a setting for the the DRAM & CPU ratio - set it at 1:1 as well. This way you can get a fair idea of how high you can go with the frequency but I anticipate that board topping out at between 240MHz-250MHz on air - whether your RAM will be able to do the same is up in the air without knowing more about the modules. With decent TCCD PC3200 memory you might able to pull off 2-2-2-5 @ 1T with 2.7v or 2.8v or you might have to settle for 2.5-3-3-7 @ 1T or 2T as jam hinted. Once you've figured out what your motherboard frequency threshold is, you can then safely consider raising the CPU multiplier in order to figure out what overclock combination works the best for your system. For example, 250 X 9.5 = 2375 245 X 10 = 2450 240 X 10.5 = 2520 235 X 11 = 2585 You should be able to wing the above without excessively overvolting the CPU (max 1.5v or 1.55v), although the PC3200 memory I suspect may hold you back - depending on how overclock friendly it is.