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Help to OC Q9250 to 500FSB

post #1 of 9
Thread Starter 
Hi, I need help to OC my Q9250 CPU to 500FSB.
Its quite old now but it is 45nm, has 1333Mhz FSB and nice 12MB L2 Cache
Currently I have it stable at 450 FSBx7
When I try to move it close to 480 I get no picture and then I have to turn it off, when i turn it back on it says "Over clocking failed! The CPU Core to bus ratio or CPU VID has failed" (I cant exactly remember the message but its something like that)
I also have a problem with my ram
I have it at its rated settings of 6-5-5-20 1.86v
But when I choose DDR3-1199 my computer freezes while prime95 blend test
So I have to do DDR3-1128 to make it 100% stable.
How can I fix this and get 500FSB?
Thanks:)
Heres some pictures of my current settings.

359wd39.jpg

314pjih.jpg

2beete.jpg
post #2 of 9
FSB termination voltage

bang it up to 1.4 and try again biggrin.gif
post #3 of 9
You will not hit 500MHz FSB on a X38 mobo and that lower binned CPU..

If you had Gigabyte EP45T-USB3P or Gigabyte EP45-UD3P (DDR2) you could try to shoot for it..

Also Asus P5Q3 Deluxe or P5Q Deluxe/ Premium (DDR2) models would be a good ground point for that OC..

For 500MHz FSB these are P45 chipset mobos that you need..

CHEERS..
     
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post #4 of 9
are you sure your board can handle 500FSB? From my experience very very few can...only my old ud3r could do it.
    
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post #5 of 9
First lower your RAM speed to avoid any problems with that. Don't overclock two things at a time or you won't know what's causing problems.

Increase NB voltage a bit (1.4 V) and up FSB termination voltage a bit, but not too much. It's a tricky setting, as I've experienced that performance went down with too high termination voltage (I've found that with my setup 1.26 V is the sweet spot).

Try booting with these settings before going further to make sure I didn't F up tongue.gif

If it works (it should, we've only increased stability), go into your BIOS again and up FSB 10 MHz and change CPU voltage to 1.35 V.

I dunno, I think that'd be a good start. Keep upping FSB by 5 MHz from there and keep bumping up the CPU voltage whenever the CPU gets instable, but don't go over 1.45 V unless you know what you're doing.

Remember to keep an eye on temps all the time and you'll be okay smile.gif

As the others have said, 500 FSB is hard on our old boards. Mine can't ever get stable above 480 FSB and yours might not be able to either.
Edited by B!0HaZard - 12/29/10 at 5:33am
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post #6 of 9
Quote:
Originally Posted by KingT;11815783 
You will not hit 500MHz FSB on a X38 mobo and that lower binned CPU..

If you had Gigabyte EP45T-USB3P or Gigabyte EP45-UD3P (DDR2) you could try to shoot for it..

Also Asus P5Q3 Deluxe or P5Q Deluxe/ Premium (DDR2) models would be a good ground point for that OC..

For 500MHz FSB these are P45 chipset mobos that you need..

CHEERS..

I am insulted good sir.

Really though you might not get it with a quad. With a dual core no problem
    
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post #7 of 9
Quote:
Originally Posted by Aaroman;11815830 
I am insulted good sir.

Insulted with what:confused:

How can you be insulted with someone`s oppinion when it`s not a insult in the first place:D

I was just being real..

CHEERS..
Edited by KingT - 12/29/10 at 5:47am
     
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post #8 of 9
Quote:
Originally Posted by Aaroman;11815830 
I am insulted good sir.

Really though you might not get it with a quad. With a dual core no problem


Highest Q9650 OC on an x38 board on HWBot is 517, thats on an Asus P5E.. # 2 in line is 490 FSB....

So chances of taking an X38 & C2Q to 500 FSB are pretty slim

What KingT said was really quite logical
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post #9 of 9
Thread Starter 
I wil try to slowly up the fsb and NB and termination voltage and see how far i can get.
Thanks
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