I don't dare to give overclocking a second try after I found out that without additional CPU cooler, the temperature would go at least 10 degree celcius hotter. No way. And I can't add a CPU cooler since I've used all the power cables!!
Thanks to that 9800GTX+ which needed 4 power cable plugs!!!
Anyway I'm not planning to start WWIII from my PC or to launch and track a space shuttle so...it will do just fine
for a couple years.