My systems configuration is Gigabyte EP45-UD3P motherboard with Intel 2 Quad Q6600 processor, 4 Gb DDR2 Ram 1066 MHz. I am having a problem while overclocking my processor more than 3.0. I am trying to over lock the processor on air instead of any water coolant. I had kept the CPU clock ratio at 9x, the host clock control is enable, the host frequency is 333 with PCI express frequency at 100. There were no changes made in memory settings. As per some information from other sources I came to know that the processor can be overclocked by without increasing the voltage. But I tried that also. I has set it to 1.2v but no results. My pc restarted and all the setting were changed to default. In MIT it shows the error denoting that there is some voltage problem. How can I now resolve this.