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Help with Q9400

post #1 of 14
Thread Starter 
Hello guys,

My Q9400 has been overclocked for a year at 3.4GHz and is rock solid. A couple of days ago I installed a Noctua DH-N14 and I want to take my overclock to 3.8 or 3.6. I am currently at 3.4GHz with 1.2425 Volts, and no matter what I do I cant hit 3.6GHz stable let alone 3.8GHz, I have pushed my volts up to 1.45 and it loads into windows but I get BSOD after a few seconds. I haven't messed with the NB because I am not too experienced with it, any advice would be greatly appreciate it. Thanks!
post #2 of 14
AFAIK 3.2 to 3.4 is the limit for that processor on air.
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post #3 of 14
Quote:
Originally Posted by HeadlessKnight View Post
AFAIK 3.2 to 3.4 is the limit for that processor on air.
^ Sorry but you are wrong.

OP: It takes a good mobo to clock a Q9400 past where you have it. What mobo do you have?

Please fill in your system specs under Quick Links > Edit Your Details > Edit System
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post #4 of 14
Thread Starter 
Msi p43 neo 3
post #5 of 14
Click on user cp and click on edit system . Get cpuz and load up system details. Mite help in lowering timing in of ram(7-8-8-24t1 to 8-9-9-30-t2 / 4-4-4-10-t1 to5-5-5-12-t2). AS the fsb is tied to ram mite help in making sure ram is not problem . or lower muilt to make sure not ram. linx is my stresser.
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post #6 of 14
Thread Starter 
Ok, I will try to when I get back home, I hope I can get it to 3.6 at least, it is the only reason why I got the new cooler :-/
post #7 of 14
Just fill in your specs as thoroughly as possible. That way folks can see what hardware you have and can weigh in on what it's capable of. Also, be sure and keep track of your thread.

Good luck.
 
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post #8 of 14
The P43 chipset has a max FSB limit of 420-430.
For 3.4 GHz it means 425X8,but I guess you are around 420X8=3.36

3.8 GHz means an FSB of at least 475
3.6 GHz means an FSB of at least 450

Assuming your cpu is capable,you need a good P45 motherboard such as UD3P,UD3R ,...
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post #9 of 14
Quote:
Originally Posted by PERSPOLIS View Post
The P43 chipset has a max FSB limit of 420-430.
For 3.4 GHz it means 425X8,but I guess you are around 420X8=3.36

3.8 GHz means an FSB of at least 475
3.6 GHz means an FSB of at least 450

Assuming your cpu is capable,you need a good P45 motherboard such as UD3P,UD3R ,...
he's right.

however, if you really want to push that core 2 quad, try messing with the VTT (cpu termination) or northbridge (MCH)

i would put the VTT at 1.28 and the northbridge at 1.3. for high speeds and high FSB, core 2 quads want a good amount of VTT and northbridge and these two values are perfect

however, you have a Q9400 and the core 2 quads didnt really get good at overclocking till the Q9550 came out.
 
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post #10 of 14
If you do have a P43 board, you've most likely reached your max limit. I could only reach a max of 421 FSB on my board which meant that its only at 3.1ghz. I'm looking for an EP45-UD3 because I know they can take my cpu higher, apparently its the best mobo for 775.
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