Help overclock E6750 and MSI p6n sli

Ok so I am an overclocking noob. I have been reading a ton about how to overclock and I think that I am getting the basics down, but I cant seem to get the computer to let me go higher than 3.0 ghz. My Ram is patriot extreme 2x1gb 4-4-4-12 timing. I have followed the basics on this thread http://www.tomshardware.com/forum/ [...] clock-650i although it is for a 6600 I used some of these settings to disable things in the bios. Any suggestions would be great.

Sorry... the voltage for 3.0ghz is set to 1.336 (+.0250). The timings are at 4-4-4-12, should I change them to say 5-5-5-15? and what i mean by cant get past 3.0ghz is the system locks up and right before bios it says that processor is for 333 and resets it back to last good config. hope this helps.

Do NOT raise SB voltage. Make sure your PCIe freq is locked at 100MHz as well. You shouldn't need to raise NB voltage just yet. I'm guessing you had your RAM:FSB set too high. RAM won't post much past rated speed.

Ok thanks. What to do:

1. Loosen timings of ram and try to boot
2. Then start adding bits to your vcore while trying to boot after each, keeping a careful eye on temps
3. It may be that your NB voltage also needs a small increase to say 1.3 but watch temps.
4. If you pass 400mhz then you MAY need to add 0.5 to SB.

This is just to get you past the 3.0ghz mark but after that you will need to increase all of these more to get a higher frequency.

Try these in order. I reckon its a voltage issue so try adding to that for stability, but be very careful with temps.

Set command rate to 2T and your RAM timings to 5-5-5-15. You want your RAM to be as flexible as it can be while you dial in your CPU speed.

Well if your aiming at booting at 3.0ghz to begin with, surely you need your fsb to be @ 1500 as 1500 / 4 = 375 and 375 x 8 = 3000 (or 3ghz). Or at least thats what it should be at if you are using a 8x multiplier.

What cooling are you using at the moment. If you have any quite decent form of after market HSF, then I wouldn't worry about increasing the vcore some more and seeing if you can boot with this. Don't forget you can more or less run a PC 24/7 with the vcore at about 1.5, just make sure you have good cooling. try referring to some of the overclocking guide at the top of the forum to see the other voltages that may need increasing. I'm not saying that you should set the vcore to 1.5 immediately and see what happens, but simply work you way up the 1.3's a little whilst monitoring temps.

Sorry for the confusion I can get to 3.0 with a 1.336 vcore, i just left it there after trying to get it higher. BTW I have a Cooler Master Hyper Tx2 cooler and with the vcore at what it is right now it is sitting at 43 under prime 95 load. Im not sure if my mobo has a 1:1 memory setting or maybe it is disguised as something else?

Well im using core temp... how do i calibrate?

Thanks ill check it out... this is why i have been reluctant to do anything crazy. BTW with the above suggestion i am up to 3.15ghz

That depends on how long you want to use this particular system. Also, I'm not familiar with your HSF so I can't be sure how fast heat will get out of control.

In my case, im at 3.6GHz with 1.425 vcore at 67c peak hottest core 24 hours under Prime. That is getting a little warm honestly. If I were concerned with keeping this system more than 1-2 years, I would back it off a notch. If I wanted to make sure I wasn't damaging something over time, I would probably keep my peak load temperature on my hottest core around 62c max. Shutdown on the Core2 line is 72c on the Tcase sensor I think. Comp's guide has proper values I believe.

Try to hit 3.4GHz next without touching the vcore. You still may even be able to lower it a touch. Lowering voltage will drop your temperatures a good bit. See if you can post 3.4GHz with 1.35 vcore. If it passes POST, then stress it.

This is where it will get tedious, because you really need to keep an eye on your temperatures for a good while, or find a way to log the temperatures to a .txt file. I think SpeedFan has that ability, I'm not sure, I just glanced back and forth at my PC for 8 hours one Saturday

If the temperatures look good, then let it run overnight. If it doesn't error, then try lowering the voltage again, OR if the temperatures look GREAT ~60c (remember, you lowered the vcore from 1.4 to 1.35 so that will eliminate a good deal of heat) then if you want to, try 3.6. However, at 3.6, you will probably need 1.4ish vcore and that much voltage and that extra 200MHz will generate a good deal of heat. With a Thermalright Ultra 120 Xtreme and Scythe S-Flex 83CFM fan it hits 67c at peak. If we assume that your cooler is slightly less efficient (TRUE is generally considered one of the best) then you would really want to keep a close eye on your core temps. If you see 68c even for a second, kill it, and clock it back to 3.4. That will most likely be your sweet spot. I don't know honestly, it's all trial and error, but that's what makes it fun

Well it froze the previous posts settings so I dropped the oc down to 3.1 and the NB down to 1.35 prime has been running for a while and it has leveled off at 63. Should I stop there?

OK Ill keep it there and get another HSF. You gotta admit though that this current HSF wast bad for a dollar at newegg with the rebate.