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Overclock and a q6600 problems

post #1 of 14
Thread Starter 
hey,
a couple of days ago i got my new computer with a Gigabyte GA-P35-DS3L and a q6600 on it.
im pretty new to overclocking so i got a friend of my helping me with it.
we disbaled the speedstep and after some little overclocking stuff he now is at 3.2 ghz (v.core= 1.3125)
my problem is when im increasing the mhz from 355 to 363-364-365-366-367 he will just crash and reboot, ofc i increased the vcore somewhere until 1.475 but it wasnt still running well, is there maybe somthing i have to disable? or is this just the limit of my processor?

hope you guys can help me with this

Night
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post #2 of 14
Try increasing the NB voltage.. Maybe the CPU VTT too.
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post #3 of 14
Thread Starter 
k ty ill try that

Edit: Cpu Vtt is cpu voltage?
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post #4 of 14
Quote:
Originally Posted by Liability View Post
Try increasing the NB voltage.. Maybe the CPU VTT too.
Yeah, I would say the same thing. In your bios, the northbridge (NB) is referred to as (G)MCH. So just set the )G)MCH Overvoltage control to +0.1v.

To give you an idea why you need to add votage to it, you might be interested to know what the NB does. It controls the system clock and communication between the CPU, RAM and PCI-E, as well as links up with the southbridge (SB). So as you increase the FSB, you are OCing the NB chip.

Aslo make sure you have the ram set at a low divider so that the ram isnt being OCed out of spec. The ram speed is based on the FSB multiplied by the divider. So you can imagine, as you increase the FSB, you are going to increase the speed at which it runs.

it should look something like this:

MB Intelligent Tweaker(M.I.T.)
CPU Host Clock Control Enabled
x CPU Host Frequency (Mhz) 3xx
PCI Express Frequency (Mhz) 100
System Memory Multiplier (SPD) 800 (with your FSB at 3xx, it will not be exactly 800, so get it as close as possible)

System Voltage Control
DDR2 OverVoltage Control: +0.2v (default is 1.8v, so check your manufacturer specs)
PCI-E OverVoltage Control [Normal]
FSB OverVoltage Control +0.1v (might need +0.2 when running 400 FSB)
(G)MCH OverVoltage Control +0.1v (This is your northbridge voltage, might need +0.2 when running 400 FSB)
CPU Voltage Control 1.325v - 1.45v (this is your CPU's vcore, it might need less then 1.35v, or it might need a little bit more... only testing will tell)
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post #5 of 14
Try relaxing the RAM timings too mate. Try 5 5 5 15...by setting your RAM manually in BIOS. Also it would help to post some more info about your system.
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post #6 of 14
Ah yeah, RAM could be doing it as well. If you're at the default divider that ram is probably trying to run itself at around 1000mhz. Put it on 1:2 if you haven't already.

As for CPU VTT, I couldn't tell you exactly what it is. All I know about it is that increasing it a notch made my OC stable.
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post #7 of 14
Quote:
Originally Posted by yannis7777 View Post
Try relaxing the RAM timings too mate. Try 5 5 5 15...by setting your RAM manually in BIOS. Also it would help to post some more info about your system.
Anything at 400 FSB and below will not run DDR2 800 ram OCed, so only relax the timings when running the ram over DDR2 800 speeds.
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post #8 of 14
well i'm the guy he talks about when saying i helped him with building and overclocking his system.
He has a q6600 with a Gigabyte GA-P35-DS3L 4 gb of OCN ram with timings 4-4-4-12 and a 1:1 divider at this moment (already under clocked, and i gave it +0.1 volt) 8800GT normal clocked...

what is that cpu vtt? since i don't think i've seen that option is his bios. The +NB volt should be helpfull and hopefully achieve something. any other adviece on how to adchieve it?
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post #9 of 14
I believe its called 'fsb voltage' on gigabyte boards.
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post #10 of 14
aaah yes i've seen that one before! i've wondered if i should tweak it or not, but i went the safe road and left it on normal!
We'll start with overvolting the NB with 0.1 and when that doesn't help out alot, might add 0.1 to the FSB voltage...
one more question, would it be safe to give the NB a 0.2 overvoltage?
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