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Discussion Starter #1
hello everyone .... i'm back again with a bloody problem..

And I hope that you lead me to the light of this Problem ..

^_( I want my CPU to reach 4.5 GHz stable, smoothly
biggrin.gif
)_^

now i'm running at 4.23 GHz ( maybe stable not sure ) ... and i really need it at 4.5 GHz or more..

I need some good settings for my system ..
here's some voltages of my system ..
ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــ

Default Voltage

Current Voltage ---- Max. Voltage
ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــ
>>> CPU
CPU Vcore

1.25000

1.37500

N/A
CPU Termination

1.200

Default

1.700
CPU PLL

1.550

Default

1.850
CPU Reference*

0.805

Default

0.805
*(Volts change when changing Termination volt )
ـــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــ
>>> MCH/ICH
MCH Core

1.100

Default

1.800
MCH Reference

0.760

Default

1.040
ICH I/O

1.550

Default

2.310
ICH Core

1.100

Default

1.400
ـــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــ
>>> DRAM
DRAM Voltage* 1.800

1.960

N/A
*( GSkill Original Volts)
RAM Timings 5-5-5-15
ـــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــ

Of course I've tried many times to reach that clock but i got errors :
mad.gif


SYSTEM_SERVICE-EXCEPTION
IRQL_NOT_LESS_OR_EQUAL

maybe because of the voltages .. who knows..

So please guys tell me how to reach 4.5 GHz and more ..
if it's the voltages give me the right ones ..
helpinghand.gif


thanks and many thanks in advance .. God bless all of you
 

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You should test your board stability, which means LOWERING your CPU multiple and stress testing high FSB. UD3 series you'll just need to play with GTL references, NB volts and VTT.

For starters, set VTT to 1.20, then bump MCH reference and CPU reference up one notch over their defaults. Then bump VTT to around 1.28 AFTER the reference values are set. Set NB volts (MCH core) to 1.36 for now and PLL to 1.5.

Bump your CPU multiple down to 6x or 7x, set 500FSB and Prime blend for a few hours (4-6 ideally) to check for errors. If you fail, try another .01 to .02 on the MCH core. Make sure your NB heatsink is getting direct air.

Report back after you find out if your board is stable at 500 or not. Once your board is Prime blend stable at 500FSB, bump your CPU multiple up and test with OCCT (cause it's fast). At that point we'll need to play with VTT and Vcore.
 

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Discussion Starter #4
thanks for replying ..

I ran 500 FSB * 7 and 6 on these settings :

Vcore 1.2500 - 1.27500
Vtt 1.20 at first then 1.28 after the reference values were set.
PLL 1.550
CPU Reference 0.855 after making Vtt on 1.28 ( automatically changed )
MCH Core 1.36
MCH reference 0.850 after making Vtt on 1.28 ( automatically changed )
ICH I/O 1.550 ( Default )
ICH Core 1.100 ( Default )
DRAM 1.800 - 2.060
-----------------------

It's never worked for me .. after saving and exiting the BIOS Setup it restarted then right away restart again ( same as shutting down ) then it works in DEFAULT mode.. everything is back to normal .. The RED window comes when I enter the BIOS Setup..

Any ideas ?
 

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Your asking a lot for 800MHz RAM, to run at 1000MHz. Your really going to have to either loosen the timings and/or pump some serious voltage. Its doable, but I'm sure not all 800MHz RAM is good to 1000MHz. Definetly use Memtest on it.
 

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8,612 Posts
my E8400 E0 needed 1.42ish to be stable in games @ 4.5GHz on an evga 680i......your ram needs to be able to push 1000MHz+ if you want a decently stable 4.5GHz oc
 

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Discussion Starter #10
ok .. i'll push the vcore to 1.45 .. but how much should i increase RAM voltage ... and do i have to change other voltages like VTT, MCH and ICH
 

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4,512 Posts
Your DDR2 800 RAM is failing. This has nothing to do with VCore, and you already know this since 500x6 fails. Reaming your CPU with more voltage while your board/RAM fails is just asking for trouble.

You need to buy a set of 1066 if you want to do this right.

My E8400 can do 4.5 on 1.4Vcore, just 'cause other people need "1.xx" doesn't mean you will.

453dm05.jpg
 

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I agree with the above. It's probably your RAM. 4.32GHz is the highest my Core 2 Duo E8400 went (C0 stepping). That was a FSB of 480MHz (960MHz DDR). I believe it was my 800MHz RAM that limited me, not the CPU or motherboard. My current Core 2 Duo E8600 hits the same limit. I couldn't get it higher than 4.8GHz, which gives it the same FSB. Granted, I didn't pout an extra .5V into everything else like the CPU, Northbridge, RAM, etc., to see for sure, but I believe the RAM was limiting it.
 
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