Overclocking Q6600


Soon I'm gonna oc q6600 from 2,4 to 3,4Ghz. Will I need to change only voltage on CPU or on RAM too ?

Abit IP35-E
Q6600 + Scythe Mugen 2
3Gb ram - 2x1024 Patriot PC800 CL4 + 1024 PC800 CL5
Chieftec 450
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More about overclocking q6600
  1. Probably.

    This should be your first stop.
    Core2 Overclocking Guide

    Next stop should be a guide for your particular motherboard. Google is your friend.

    Go through the guides. Then take your core voltage off Auto and set your memory voltage to factory recommended values. Change the System Memory Multiplier (or whatever your BIOS calls it) from AUTO to 2.00, 2.00B, or 2.00D - whichever you need to set the Memory Frequency to twice the FSB. Then when you increase the FSB, the memory clock will rise in in proportion with it. At an FSB of 266 MHz, your memory clock should be at 533 MHz.

    Download CPU-Z to check your FSB:RAM ratio. It should be a 1:1 ratio.

    The guides will tell you how to test for stability. Keep the core voltage under 1.5 volts and the loaded core temps under 70 C .
  2. Ok - now I have FSB:RAM ratio 5/6 (e6750@3,2 only clock higher, the rest is default)

    Tell me if I'm right. My ram is 800mhz so max FSB i can get (theorically) is 400, right? So with multiplier 9 I can achieve 3,6Ghz with my ram. Will I have to change ram speed?

    Sorry for all the questions but I'm kinda new into more serious oc.
  3. Ok. I've just set my ram speed to from 1:1.20 to 1:1. (still on e6750 - i'm gonna get q6600 in a few days) So that's the principle - to set FSB:RAM to 1:1, make sure to set my FSB to the one that my ram can work on and then the lowest, stable running voltage on CPU ?
  4. don't leave pci-e on auto, set that to 100 manually. When going above a fsb of 333, I like setting the nb, fsb termination, and pll voltage as well.
  5. pci-e is 100 - i know. But what about dram frequency and fsb/dram ratio ?

    With e6750 oc'ed to 3,2ghz with auto setting on ram I had ratio 1:1,2 with ram speed 960. (cpu-z showed FSB:RAM 5/6. Now I've set it to 1:1 and have ram speed 800.

    (my ram is 800mhz ddr2)

    Which settings with q6600 will be better ? Higher ram speed and asynchronous fsb:ram ratio or should I stick to 800mhz speed and ratio 1:1 ?
  6. I don't think the ram speed makes all that much difference. Set it at 1:1 to start with, then work on getting the CPU to be stable. After that if you want to play with the ram you can try that.

    I hope you are using a good aftermarket cooler with that Q6600. The stock cooler won't allow you to go that much overclock.
  7. Oh yeah, I'll have Mugen 2 with Q6600.

    Ok - so I'll start with 1:1. Then maybe set some higher ram speed and see if I notice any fps rise.

    What about the voltages? If I set them to auto and it'll work fine should I leave it that way?

    And if not - is there any tutorial what voltages should I set for ram or cpu or should I just play with them to set the lowest stable ?
  8. You can tweak the cpu voltage down or up as needed (lower than 1.5). With the ram voltage, just set them to your manufacturers specification, and forget about it unless you run into stability issues at your rated speed, then a small bump up should be ok.

    As JSC said, there is a guide with good info on how to overclock. I haven't read it, but I'm sure they talk about the different voltages, and how to test for stability.
  9. Ok. It's all clear to me now. Thank you all for your advices.
  10. I know on my Q6600 I got to 3.2 without upping the voltage. I got 3.0 and could actually lower the voltage just a little to save a little energy. You may want to see how high you can go without that and see if it is acceptable.

    I have an IP-35 Pro (essentially the same motherboard) and a Tuniq tower. It has been running like this for 3 years or so with no issues.

    Also, consider dumping that single stick of ram (or getting some matched memory for the others) to get the benefits of dual channel memory. It probably won't make much difference, but it is something to play with.
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