hey i have an old pentium 4 running at 1.8 ghz, i have a 256mb vga and 1 gb memory, i can play half life 2 source and dod:source but only at 20 to 30 fps with 1024x768, i was wondering if i could get my pentium to around 2.2 to 2.4 ghz without buying any extra fans or what not?and even if i do get it that high will i see a performance boost in my games? also how the **** do i overclock, do i need some extra software or can i do it without buying any software? and just overall how do i do it?