JuiceJones

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Hi all, I recently purchased a Q6600 and Gigabyte GA-EP45-UD3P, and my overclocking results have been very disappointing.

My proc came with a rather high stock voltage/VID of 1.325v, and takes disturbingly high voltage to stay stable at seemingly normal overclocks. Temps are not an issue, I have a beastly Xigmatek HDT-S1283 at 100% fan and barely see 60 degrees.

For the past couple weeks, I've been at 9x350 for 3.15Ghz at 1.425v. I don't like this voltage at all, my old E6400 could do 3.2Ghz at 1.36v no sweat and hit 3.4Ghz stably at 1.45v. 400x8 didn't stay stable without going over 1.44v, and 3.4Ghz failed Prime95 promptly with a hefty 1.475v. I was really wanting a daily 3.4Ghz, but if this means 1.5v or more, it's out of the question. I've tried a myriad of things to rule out motherboard and RAM limitations, raising FSB/MCH voltages and running RAM below spec have no effect. I even experimented with this CPU "termination" voltage to no avail.

Core #1 is always the first to fail, so I assume it's just not a good overclocking core, I have to accept what I can get.

My main question is, if i could squeeze 3.3Ghz, but it takes up to 1.5v, would you consider it worth it? It seems a little too high, and I don't want to degrade its life too much since almost all my parts end up being hand-me-downs to others in the household. But I'd really like a daily clock speed above 3.2Ghz, just to feel more like an all-around upgrade from my 3.2Ghz E6400 (even though cache should take care of that even at 3.15Ghz).

Plus, if anyone thinks there's something else hampering my overclocks, I'll take any suggestions. I've tried disabling various power saving features in the BIOS, and am fairly certain I ruled out mobo and RAM limitations by setting them below spec and adjusting the FSB "strap" accordingly. I'm a little bummed with this poor overclocking.
 
Yes!! I'm not the only one running 1.425V!!!

:) I run 3.2Ghz @ 1.425 (BIOS) which CPU-Z shows as 1.39V. :) And I have a crap 680i LT SLI motherboard.

Keep in mind, you'll be running 4 cores @ 3.2 or 3.3Ghz (whatever you end up getting) compared to 2 cores @ 3.2Ghz. Plus the higher levels of cache. So you're still getting better performance. And frankly, even with Crysis running on my 3.2Ghz OC I get fine performance. So it's not like you absolutely must have more OC.

Some chips just OC better than others. Seen folks who can hardly break 3Ghz, and seen folks who can do 3.6Ghz easy. It all varies.

You could also try different FSB settings. Rather than doing exactly 350, or 400.
 

JuiceJones

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I forgot to mention it's G0. Well jerreece, I suppose misery loves company. 3.2Ghz was only 6 hours stable for me at 1.43v. I suppose I'll juice it up to 1.45v and see what that brings.

Next line of price drops and I may spring for a Yorkfield. I have three other dual-core viable homes for this Q6600 where top clocks are far from priority. It's still a nice addition to my little Folding@home farm, despite not quite satiating my gaming rigs thirst for hertz.
 
I apparently got pretty lucky. My VID is 1.2625 volts.

I (rightfully or wrongfully) believe that if vcore is less than 1.5 volts, temperatures are more important. I am running at 3.6 GHz at 1.45 volts (drooping to 1.425 volts) with a hand lapped TRUE/S-Flex SFF-21 in an Antec 900 case with all fans set to Low. Core temps are 61 C and 65 C.

My particular TRUE had an off-center bulge and some machine marks on another corner.
 

JuiceJones

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I'd like to hear other people's opinions on this. I don't like the idea of running daily so close to 1.5v, but if I can squeeze 3.3Ghz (and I know the gains over 3.15Ghz aren't much, less than 5%), and the general consensus is it wouldn't hurt to run 1.475~1.5v, I may just do it.
 

pablosns11

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The most i ever pushed mine was 3.61ghz on a 1.5v
Using a Asus pk5 pro with a ZEROtherm BTF95 & Arctic Silver 5. Mine never goes past 63C max .
It all depends on the chip. My old G0 would not go past 3.2ghz with the same setting. There is nothing wrong with your chip it all depends on the batch you got
 

skydream

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I have a q6600 with a vid 1.325 and a ud3p motherboard with xiggy 1283. I can hit 3.4ghz by putting 1.5v in bios and vdrops to 1.456 in cpuz then vdroops to 1.39v underload. I use intel burn test to test for stability and temperature, its much faster than prime95 small ftt. If i pass 200 runs with IBT then I do 24hours of of prime95 blend. My max temperature with these settings are 65c. I believe for a 65nm chip its ok to have voltage 1.5v or lower. You can try using load line calibration if you really want to hit 3.4ghz.