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E6550 Stuck

post #1 of 18
Thread Starter 
I am trying to get a little bit more time out of my old E6550, I need to finish buying a house before I can upgrade. I had it overclocked to 2.88 GHz for the longest time and it was stable. I tried hitting 3.5 Ghz last night, but couldn't do it, no matter what I tried. So I am stuck at 3.3 Ghz with a sometimes stable overclock. My clock is now 475 Mhz with 800Mhz on my memory, all of this through an nVidia 680i SLI. I did find a thread devoted to the 680i on this forum, but it hasn't gotten me far. Can anyone give me any pointers so that I could possibly hit 3.5 Ghz or higher with this jalopy? I've tried everything I can think of, and it won't even boot past 3.4 Ghz.
post #2 of 18
You probably won't be able to go any further because the FSB is too high. Normally, 680i can't go more than 475-500MHz FSB. Some boards have the ability to raise the NB or Northbridge voltage. By raising this, you may be able to get a little more, but it is pushed pretty hard already.
Personally, I would back the FSB to 465MHz, and have a stable system @ 3.25GHz

BTW welcome to OCN thumb.gif
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post #3 of 18
Thread Starter 
Thanks for the help Bartonn, I had heard the srap above 480 Mhz was rather dodgy but was hoping there was some magical element to the equation I was missing. What is the recommended procedure to fine tune the voltages, keep lowering and testing until it is unstable, then raise it slightly? My current volts to CPU are 1.416, and it seems pretty stable without excess heat. I believe it is also within safe specifications, should I just leave it here?
post #4 of 18
You could lower your CPU multiple and work on tuning your board for high FSB, but that will involve raising NB voltage and may shorten the lifespan of that already older board. I had a 680i and the older it got the less capable it was with overclocking.

You also need to watch your RAM speed and keep that at/under rated speed. have you checked to see what your ram is running?

You're kind of screwed by the 7x multiplier. Your best bet would be to throw an E0 E8400 on it if you can find one cheap.
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post #5 of 18
Thread Starter 
Well I tried lowering my multiplier to 6 and raising my fsb to generate the same overclock, but I couldn't get it to work, it wouldn't boot. I already have my NB at its highest setting (I think it is its highest) of 1.5 volts. I have my memory speed unlinked from the cpu, it is at 800 mhz with 1.85 volts.I was hoping I had an FSB hole holding me back.
Edited by Core2Glados - 12/4/11 at 2:56pm
post #6 of 18
3.3 is not to bad for the chip though, why do you need more performance out of it? Max I could get out of e6400 was 3.5Ghz stable (Same as E4500, both on P35 giga boards) Ram plays a role to, tried letting ram link with CPU?
post #7 of 18
Thread Starter 
I'm trying to get more power because of a crysis mod I have been playing (mwll), long story short, my GPU was at twelve percent load, while my CPU when it was at 2.88 GHz was at 100%. With 3.25 GHz I'm at 90%. Unfortunately the 680I only supports ddr2 ram. I want to upgrade the mobo and get an i7, but buying a house has forced me to make this system squeal for a while longer.
post #8 of 18
As other stated, I do not think you would be able to go much higher as you will hit a FSB wall soon
or if you havent already.

that chip was never made to be overclock and defiently will not hit 3.5ghz for sure.

i would assume 3.0ghz would be the fastest you would be able to get outta it.



if you really wanna go somewhere i could only recommand that you either upgrade to quad core that is supported by your mobo or just live with it,

Dual cores are starting to phase away i would suggest soon or later you just buy a used quad core that is supported.

Even a low end quadcore like a q8400 or something like that would be able to hit at least 3.2ghz with a 8.5/9 mutiplier
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post #9 of 18
Throw an E8400 on there. You'll get much higher clocks and better thermals
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post #10 of 18
Quote:
Originally Posted by Darkshowdo View Post

that chip was never made to be overclock and defiently will not hit 3.5ghz for sure.

i would assume 3.0ghz would be the fastest you would be able to get outta it.




I dunno about that, these C2D chips can clock very good and are known for it, I run a e6400@3.5Ghz 24/7 stable for a few years (Same chip just slower @Stock) and even got a e4500 to those speeds, others have hit even higher clocks, the C2D chips are great clockers for their time, even first gen ones such as the e4500 can clock very well. But board and memory play's a big role to, if your ram can't clock good to keep up with the chip then that can hold you back. Some ram I could only get up to 2.8Ghz, others 3.0Ghz, but OCZ Gold sticks clocked like a dream and could be linked with a high FSB bus on the CPU. Of course using rock solid Gigabyte boards helped allot.

E8400 won't be that much of an upgrade, if you stay on 775 I'd advise going for a quad, q6600 or q9450.
Edited by Jomox - 12/5/11 at 3:19am
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