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OCing E8400, No Idea What I'm Doing

post #1 of 21
Thread Starter 
Well I need help once again, I just got this new system but the problem is I don't know how to overclock a CPU or RAM. I looked at all the stickied guides, but they are vague and don't really tell what to do or how a certain setting affects your OC.

Running at stock, CPU-Z says my core voltage is 1.168v...I thought the VID of this CPU was 1.225...Anyway I started messing around in the BIOS, I turned off all those speed step and VGA booster settings like I read, then I went to the M.I.T. section and started screwing with numbers, I heard that FSB:RAM should be 1:1, mine was currently 5:6 so I set the FSB to 400x9 and the System Memory Multiplier to 2.00 and I got a 1:1 ratio with a 3.6GHz clock at 1.225v. That was unstable the second i ran orthos. And on the subject of RAM timings, I have no idea what they do, well the RAM stickies told me what they do, but not how they affect an OC. Anyway those are currently at 5-5-5-15.

As you can tell I have no clue what I'm doing so if someone could either help me out here or point to a good guide, I know its a lot to ask, but I would really appreciate it...this E8400 is almost wasted at stock. Thanks!
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post #2 of 21
dont crank fsb up that high at first, there will be to many variables to factor in. start small like 20mhz increases till it gets unstable, lower back down 5-10mhz till stable, up voltage, change ram timings (looser) change multi then begin climbing fsb agian. rinse and repeat thats what i do for my amd anyway dont know if its differant for intels
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post #3 of 21
Thread Starter 
Quote:
Originally Posted by DjQurt View Post
dont crank fsb up that high at first, there will be to many variables to factor in. start small like 20mhz increases till it gets unstable, lower back down 5-10mhz till stable, up voltage, change ram timings (looser) change multi then begin climbing fsb agian. rinse and repeat thats what i do for my amd anyway dont know if its differant for intels
But when you say make RAM timings looser, loose like what? 6-6-6-16? Should I change the RAM voltage at all? Because I have no idea what those numbers actually do.

EDIT: Also how long should I run Orthos in between these small FSB increases, like an hour?
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post #4 of 21
I have nearly the exact setup as you, you dont have to waste time with 20mhz increments with C2Ds lol, you can go much higher than that, like in 100's mhz. 3.6 is where I started off and no problems whatsover. Having said that, each chip is different and may react differently to voltages and other settings.

At 3.6ghz you're ram can be left at its defaults (which happens to be a 1:1 ratio).

This is what I advise you to initially put your settings:

CPU clock ratio: 9
PCI express freq: auto
CIA2: disabled
Performance enhance: standard (not default turbo)
System Memory Multi: 2x
Leave other ram setting/timings on auto for time being

System voltage Control: Manual
Put all voltages on 'normal' except CPU
CPU voltage control: try 1.275 initially.

If unstable, just raise you're vcore by one notch (ie, 1.28125) and repeat the stress test again until stable. I recommend OCCT (for 1 hour), it keeps logs of you're voltage fluctations and will show if vdroop may be impacting the success/failure of you're OC. Good luck.
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post #5 of 21
Thread Starter 
I saw your system earlier and was thinking of PM'ing you about it, but that is actually what I tired at first, 400x9 @ 1.275, but after some reading, I saw that my BIOS wasn't updated to support E8XXX CPU's so I did that and now I'm going to try it again...brb.
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post #6 of 21
if you could post with the e8400 in the socket, your bios supported it. If I were you, try 400x9 and 1 notch above your stock vcore (your VID in this case), and leave all your ram timings and voltage to stock.

Once you get 3.6 stable, you can move up
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post #7 of 21
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Just did 400x9 @ 1.275v, instant BSOD upon starting prime95. I'm at 390x9 @ 1.28125v now, just posting this incase of another BSOD. And you guys are sure I don't need to change RAM voltage or timings at all?

EDIT: Maybe I should've posted this tomorrow...not many people online at 3:30AM I guess
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post #8 of 21
Quote:
Originally Posted by Jacko87 View Post
Just did 400x9 @ 1.275v, instant BSOD upon starting prime95. I'm at 390x9 @ 1.28125v now, just posting this incase of another BSOD. And you guys are sure I don't need to change RAM voltage or timings at all?
your ram should remain at it's stock settings. so if your ram is rated 4-4-4-12 @ 2.2 v, keep it at that. You shouldn't have to change anything, thus far.
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post #9 of 21
Thread Starter 
But my RAM is at 5-5-5-15 with 1.8v...
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post #10 of 21
Quote:
Originally Posted by Jacko87 View Post
But my RAM is at 5-5-5-15 with 1.8v...
So then set it to that. I just used my timings as an example...
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