Originally posted by: kayawish24
@ MTDEW
can you tell that if i put vcore to auto in bios and then overclock the q6600 to 3.4ghz so will it harm my cpu or mobo???????curently my vcore is on auto
Look. I don't know about the P5N-T per se, but it is a 780i motherboard, and I know ASUS BIOS for the nVidia chipsets. Without those of us with firsthand experience, you could set everything to stock, go into BIOS after stock settings are effective, and drill down to BIOS monitor. Write down the voltage reading for your "Auto" setting. Then, go back to the menu of voltage settings and change VCORE to that value. Then, set FSB/memory configuration to "unlinked" or "unsynchronized." FSB should initially be 1066, and RAM [DDR] should be 533. Increase the FSB to 1334 and the RAM to 667. If it won't boot, our you boot up to Windows and run PRIME95 multi-core "blend-test," and it fails -- increase the VCORE a couple notches, and go again.
However, many here would probably tell you that you need to set VCORE to about 1.30 to 1.32V to get it stable for 3Ghz, 1334 FSB and 667 RAM. -- also make sure before you start that RAM is volted to the upper range of warranty voltage. If the RAM is supposed to run on voltages <= 2.1V, set it to 2.075V -- and/or then reboot to BIOS and check BIOS monitor to see what actual voltage is, then adjust as desired. Leave memory latencies to stock values.
From there, increase FSB by 20 and RAM by 10, reboot to Windows, run PRIME95 -- make a note of how long it takes to fail. If necessary, push VCORE up another notch. If system crashes when it fails, push VCORE up by two notches. When you get close to FSB = 1600 and DDR = 800, you will need to adjust CPU_VTT voltage as high as 1.4V.
You may not get to CPU = 400 Mhz x 9 = 3.6 Ghz. More likely, you'll get it only as far as 367 to 378 Mhz x 9 = 3.3 to 3.4 Ghz. That is, your FSB setting will be between 1468 and 1512, and your corresponding DDR speed between 734 and 756.
Play cautious, exercise patience, and find the limits as above through trial and error.