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Overclocking Q9400 to 3.6GHz - Max Voltage??

13326 Views 21 Replies 10 Participants Last post by  Caspr
Hi Everyone,

I just installed installed a Q9400 into my DFI Lanparty DK P35 T2RS mobo, and added a Xigmatek HDT cooler (with MX-2 thermal compound).

I can get to 3.2GHz no problem with ridiculously low temps and not much voltage.

But my goal is 3.6GHz.

So I jumped right to 450FSB (I know, I shouldn't do that). And then slowly increased the voltage. Now I am up to 1.312V for the core volatage (I am using a 333/667 ratio for the memory to keep it at 900MHz at 2.0V).

Is 1.312V too high? Intel says it can go up to 1.3625V, but this still seems high. Should I be adjusting other voltages?

Thanks in advance!
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Originally Posted by GamingDaemon View Post
Cool. Thanks guys. My temps under load is high 30s low 40s. And no, my room is not cold. It is actually quite warm.

But cores 2 and 3 never seem to move. I adjusted RealTemp so the TJ Max is 100, but it just seems wierd that they never change. Did I not spread the themral compound enough or something?
dont adjust the TJ max if you have the newest version of Real temp you dont need to adjust it. Its stuck sensors 2 of mine never go below 37c
 

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Originally Posted by Prong View Post
I needed 1.375v in bios for vcore which meant 1.34v idle and 1.31v under %100 load in windows after vdroop with LLC disabled. Also needed 1.49v for northbridge and 1.36v for fsb term voltage to get it really stable at 3.6Ghz.

Even I had no problems for nearly a month @3.6Ghz I just reverted back to 3.4Ghz with safer settings. 1.49v seemed just too much for me and I do not have the chance to track nb temp on my Asus P5E3 since it doesn't have a sensor for nb. Even I had no idea about nb temp and as far as I knew safe max for nb was 1.45v I didn't like the idea to run it with a higher voltage than recomended and using my q9400 @3.4Ghz for 24/7 use.

Good luck with your oc...
I wonder if you had a P45 or x48 board if you would have better luck overclocking the Q9400
 

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I have to push my voltages alot to get past 460fsb(vcore in bios is 1.33375) unless I enable LLC and the only reason I dont keep it enabled is due to temps. I would need to set vcore to 1.4 bios to get to 3.8 stable damn voltage droop and drop
is the only thing I dont like with my board. My nb voltage has no effect on my overclock only vcore gets me stable.
 

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Originally Posted by Prong
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Temps are the only reason to keep it enabled or disabled ?

I use enabled LLC only to reach the same speed with lower voltage and my temps doesn't seem to be affected by LLC too much at all. For example my Q9400 is very stable with 1.21v underload @3.4Ghz. With LLC enabled I can set my vcore to 1.24v in bios which gives me only 0.03v for vdroop because of enabled LLC. But if I disable LLC vdroop increases to nearly 0.07v and so I need to set vcore to 1.275v in bios to reach the very same speed.

With both choices it needs to have 1.21v under %100 load. But with enabled LLC I have 1.21v both when idle and underload. With disabled LLC I got to have 1.24v idle which is higher than enabled LLC situation and 1.21v underload.

So if lower voltage means less heat why would you not enable LLC unless you are very close to max vcore ?

I have to keep LLC disabled. If I leave LLC on I can drop the vcore down to 1.33125 in bios and be stable at 3.8 but temps hit the high 70's running Linx and running prime95 blend temps are 67-71 thats with an ambient of 21c. The temps are just to high for me and once summer rolls around the temps would be alot worse.
 

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I might have to get around to messing around with LLC and vcore again. My vcore vdroop isnt terrible its when its under load is the problem. if I set the vcore to 1.3875 in bios in Windows its 1.34, under load it drops to 1.24-1.296 range. I probably need to have my vcore at or around 1.3 under load at 1.312 it passes.
 
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