點樣可以超頻到4GHz?

我部電腦既資料:
CPU: Pentium Dual-Core E6300 (2.8GHZ, 2MB L2 Cache, 1066MHz)
MB: Magic-Pro GMHD-D3 (G41)
RAM: 2GB DDR3 1333MHz

個BIOS default:
倍頻: 10.5x (6~10.5x)
CPU Diff AMP: 800mv (700~1000mv)
DRAM Clock: AUTO (AUTO/ DDR3 800/ DDR3 1066)
Host/ PCI Clock: 266MHz (266~600MHz)
CPU Vcore 7-Shift: Normal (Normal~ +350mv)
VCC 1.5V PLL: 1.527V (1.527~3.013V)
VCC 1.5V: 1.527V (1.527~3.013V)
GMCHVCCP: 1.220V (1.220~2.421V)
VCC1V1: 1.137V (1.137~2.257V)
DRAM Voltage: 1.572V (1.572~3.223V)

我試過調:
CPU Diff AMP: 1000mv
Host/ PCI Clock: 333MHz
CPU Vcore 7-Shift: +350mv
DRAM Voltage: 1.729V
就上倒3.5GHz 再上就唔得

我想問點樣可以超頻到4GHz?