I have an eMachine come with AMD Athlon 64 3200+ CPU. I went to Set Up and found it set to 200MHz, but it also listed that I can change from 200 - 230 MHz. I tried changed it to 220MHz and run just as normal. Temperature just 1 degree C higher than previous. But doesn't seem work faster than before. Does anyone think I should try 230MHz as I dare not?
Try 205, then 210, then 215 etc...even smaller increments if I were you.
Each time you boot with the new clock speed, take a look at CPU-Z and see what your clock speed is at. When you stop making improvements, that's your initial 'limit'...unless you want to start messing around with RAM timings etc.
On my 4600+, I couldnt get much of an overclock until I slowed my RAM down. I had to set the maximum RAM clock to 667 rather than the 800 that it is rated at. Gave me an extra 200+Mhz though.
As far as I have read, sacrificing the RAM for extra CPU power is worth it.
If you start getting stability problems i.e. crashing, try upping the voltage a bit - but not over 0.0500V extra.