the trick with overclocking is not to pick a number and expect to try OC to that number. you start by first gradually increasing the FSB and seeing how far you can get without increasing VCORE voltage, and keeping your ram at or below its rated speed, making sure your temps are cool enough. you can then gradually increase VCORE to get it stable. Before you do this read lots of articles about overclocking. Also read some info about your motherboard, the g41 ghipset is not particularly good for overclocking. Even with a gread board and cooler, getting a 1ghz overclock on a core 2 quad CPU is difficult.