Last overclock try with yorkfield processor showed that with a good air cooler , 2000 rp/min fan and vcore voltage increased to 1.5 v, such processor are capable to work at 4490 MHz.
The Known overclocker Victor wang reported about the overclock of processor core 2 Extreme QX9650 (3.0 GHz) to 4.5 GHz with the use of certain cheap air cooler ($10) and vcore 1.42 v. at this frequency the processor executed the test superPI 1M in 10,047 seconds.
The multiplier was increased to 10x, and the system bus frequency was equal to 450 MHz.
After raising the core voltage to 1.65 v, the processor succeeded to overclock up 5.3-5.4 GHz, but in this case as cooling it was necessary to use a minus 120 degrees Celsius solution . The author hopes To improve this result after the modification of the motherboard asus P5E3 deluxe on base of chipset intel x38.
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