You may be right. I've read that guide you posted earlier and also other resources on the Internet, and from what I understand it pretty much boils down to luck of the draw when you buy your CPU. Several people can have the same exact 3570k in the same build and in the same room with the same ambient temps, but some may get luckier than others and are able to clock higher. So I may have to settle for 4.4, but I can't complain as it's my first OC and I'm happy with it. Right now my bios is at default settings after my last attempt at a 4.5 clock, so I reckon I'll just set it to 44 and just play with the voltage and find the lowest stable setting for myself and be content with it and wish for better luck on my next build. Unless someone else comes along and has some other input or advice for me. Thanks for the help, again!