|Increasing the RAM amount from 1GB to 4GB will make a huge difference in performance. After the new RAM is installed, THEN you can consider overclocking. And in your case with an 800MHz FSB CPU, it's not as important to increase the overall CPU clock speed as it is to increase the FSB speed.|
Your E4600 runs at 12 x 200MHz (2.4GHz) at 800MHz FSB. If you were to change the clock settings to 7.5 x 333MHz, the CPU would run at 2.5GHz (a meager 4% increase) but the FSB speed would be 1333MHz, which is a whopping 67% increase!