Need help to OC q9550 to 3.5 ghz

Hey all brand new member here. I've been doing soome reading but oc'ing just fasinates me and I was hoping I could get some help ocing my CPU. So here are my specs.

ASUS P5K-E/WIFI-AP LGA 775 Intel P35 ATX Intel Motherboard
GeForce 8800 GT 512MB 256-bit GDDR3 PCI Express

So i'm shooting for 3.5 Ghz
8 answers Last reply
More about need q9550
  1. Read the OCing sticky.
  2. what heat sink are you using? if it is stock, get a new one, intel's heatsinks are notoriously bad
  3. Its a Zalman cnps9500 at
  4. thats reasonable for OCing, not sure what temps you will get though, shoot for below 60c at load.
  5. So I'm using a program called speed fan. My tems range from 58-54C. The sad thing is that I haven't even started to OC them.
  6. speedfan is popular and often updated, so it should be accurate
    on an air cooled system, the HS can be as big and fancy as it wants, but if there is no air moving through, it wont cool very well. my intel C2D e8500 was hitting 45C idle at stock speeds with a stock HS. i then spent money on a new HS, a powerful 120mm exahaust fan and an expansion-slot exauhst fan. i installed the parts, covered over the side vents, and made a front intake hole by poping out a 5 in expansion slot covers. now all the air that comes into the pc goes past the HS. fanspeed reports about 40C idle after i OCed it to 4GHz. it doesn't look pretty with a hole in the front, but its under my desk. if you do the same ( as in lots of airflow past the HS) it should cool right down.
  7. I think that you will need something better than a 9500.

    Increasing the FSB to 400 MHz. will get you to 3.4 GHz. You should be able to reach that with little or no voltage increase.
  8. 54-58C at Idle? If so, get some better thermal paste like AS5 and reapply your heatsink/fan. If it's ~60C at full load, then you're set to overclock.

    There's several programs I would use to keep check the stability of the system during an overclock.
    1. Intel Burn Test
    2. Prime95
    3. CPUIDHWMonitor


    Read that guide.
    After you get what's going on here is what I would suggest you start doing (settings in BIOS).
    1. Set the PCI Express Frequency to 100mhz (so it does not automatically scale when you increase the FSB).
    2. Increase the FSB to 400 MHZ (like the above posters said, you should be able to reach that at stock voltage).
    3. Run Prime95 in large FFT/blend to check for CPU/RAM stability (if it crashes, you might need to adjust your NB voltages by a little).
    4. If Prime95 is stable and your temperatures are good, then run Intel Burn Test and see if there's anymore problems.
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