New to overclocking - E6750 With ASUS P5K

Hello,
OC'ing is all new to me...
System specs :
Intel E6750 @ 2.66 with Arctic-cooling freezer Pro Rev2
MOBO : Asus P5K (AI lifestyle bios)
mem : 4 gb (2dimm kit) GeiL black dragon PC28500 1066mhz (5-5-5-15)
GPU: Asus 8800 GTX (to be changed soon)
PSU : Tagan 2force II 700W

I already Putted the bus speed to 400 mhz. the cpu has a locked multiplier (8), so that gives me 3200mhz.
I wanted to keep the memory @ 1:1, but my mobo won't let me chance that, instead it gives me "numbers" correspending with the available frequencies i presume.. i think i chose 1033
As a result my Dram frequency is 500 mhz according to CPU-z with a 4:5 ratio...
All the other settings i left auto... (vcore , etc etc et)
My system ran with orthos all night with no errors, and temperatures are around 30-32°C idle and highest on full load was 52°c


Now i wanted to hit 3500mhz, but when i entered 430 for the bus speed in the bios and raised the vcore to 1.4V (all other settings where auto again) and for the memory i chose the "number " closest to 1066mhz...
Pressed F10 - save and exit
Reboot beep AND...
nothing happened...
the screen stayed black...
After a while it rebooted and i got the message : Overclock failed
and i was redirected to the bios to try again :P

So what am i doing wrong (prolly A LOT)

so some guidance is always helpfull :D


greetings Odan :D
5 answers Last reply
More about overclocking e6750 asus
  1. I don't know much about Core 2 overclocking, but have you looked at the Core 2 Duo and Core 2 Quad Overclocking Guide, stickied in this forum?
  2. I did now ...
    gonna try and put the fsb : mem ratio at 1:1...
    now I know how to calculate :D
    hope 3.5Ghz will work someday :D :P
  3. Once you get the FSB:RAM ratio to 1:1 (I recommend doing that first), you can raise the FSB and the ratio will stay at 1:1.

    You may not be able to reach 3.5 GHz with stability using an AC7FP. Your cooler, by today's standards, is a pretty average cooler.

    Suggestion - look for an overclocking guide for your particular motherboard.
  4. I did some more tries and after that some more internet digging...
    it appears my mobo is not designed to go past 400 mhz Bus speed.
    when entering a value above 400 it does not complete post...

    So either i am stuck with 3.2Ghz, or get another mobo...

    I don't think i am going to upgrade the mobo since i gonna buy me a new system in a year or so ...

    All thx for the help anyway :D
  5. Odan said:
    I did some more tries and after that some more internet digging...
    it appears my mobo is not designed to go past 400 mhz Bus speed.
    when entering a value above 400 it does not complete post...

    NOT TRUE, your MB will surpass 400 without a problem. Change your memory to 1:1, YES you can, and then try to OC again (make sure to up your NB and set your GTL ref voltages).

    This is over a year ago and I don't have this computer anymore, but, the FSB is at 525, That's as far as mine would go with DDR2 memory:
    http://forums.overclockersclub.com/index.php?s=&showtopic=66496&view=findpost&p=1676325
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