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Unable to Overclock to even 2.2Ghz

post #1 of 16
Thread Starter 
Hi guys,

Recently I tried some advice that I got from another forum, and upped the FSB speed of my CPU from 200mhz to 220mhz. After the initial change, my PC kept restarting just before it would hit the boot screen. So, I changed it back to 200mhz and all was fine again. How can I OC this CPU? I've read that the 3800+ is a great overclocker. I also noticed that it's only receiving 1.26V of power. Is this enough? There are no options in the BIOS (or at least not what I could find) that allows me to change the CPU voltages.

Any assistance would be REALLY appreciated, I'm stuck in the dark here and don't know what to do anymore.

Thanks guys,
GBM
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post #2 of 16
Hey "GBM" welcome to OCN, its a great place... you'll find what you need here.

To OC your 3800 you'll have to deal with a number of things: FSB, htt mulitplier(1x,2x,3x,4x,5x, or in some bios 200,400,600,800,1000), Vcore (cpu voltage), ram dividers, vdimm (ram voltage) and so on. heres a quick rundown on how this works. FSB x htt multi < or = to 1000MHz ( so when you did 220FSB x the stock htt multi of 5 you got 1100MHz), which is likely the cause of your inability to boot.
when overclocking its usually best increase the FSB in small incriments, rather than a large jump at a time, so this time insead of going right to 220, try 203 or 205, then 208 and so on. also you seem to be under stock voltage of 1.3v ( at leaset i think thats the stock voltage) so that could also be contributing to the problem. try looking under advanced chipset features in the bios and see if you can increase the Vcore.
lets leave it at this for now(little bits of info at a time help us all from getting way confused), let us know how it goes. good luck.
post #3 of 16
Thread Starter 
Hi Logan,

Thanks for the quick reply. It's always nice to have someone take interest and provide assistance so rapidly.

As for the HT multiplier, I can't seem to find it in my BIOS. When I enter "Jumper Configuration" (Which is where the options for OC'ing my CPU are), it only gives me 3 settings to configure.

- CPU Frequency [200.00]
- DDR2 Voltage Control [Auto]
- CPU Multiplier [Auto]

Like I said, I can't seem to find the settings for the HT multiplier anywhere in the BIOS.

Thanks so much for your time.

Regards,
GBM
Edited by GreatBigMouth - 6/23/08 at 3:03pm
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post #4 of 16
In asus bios, well atleast mine, they label the ht multiplier as K8-NB frequency.
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post #5 of 16
Quote:
Originally Posted by vwgti View Post
In asus bios, well atleast mine, they label the ht multiplier as K8-NB frequency.
haha, man, sometimes I feel really lame, thats what they call it in the biostar bios on my new rig (only had it a week or two so far, havn't had time to really get way to into OC'in it). I upgraded from a socket A... I'm still getting used to it. I had to look around for it the "htt multi" too.
post #6 of 16
Thread Starter 
Quote:
Originally Posted by vwgti View Post
In asus bios, well atleast mine, they label the ht multiplier as K8-NB frequency.
Thanks for the reply.

I had a look in the BIOS and also couldn't find a "K8-NB Frequency" listed under any of the menus. I may just be looking in the wrong place here, but it seems that my BIOS isn't exactly rich in content.

Regards,
GBM
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post #7 of 16
Iin my bios you have to take the K8-NB freqency off of auto first, then it gives me another list where I can change it.
post #8 of 16
Thread Starter 
Here's something interesting.

I flashed my BIOS and updated it to the latest version, and it now boots up when changing the FSB.

I changed it very little at first though, to 2.06ghz, and it seemed stable. The only problem now is that my HT link jumped from 1000mhz to 1030mhz, so I'm guessing that finding the HT multiplier is essential, since upping the FSB also increases the HT link.
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Moogar II :)
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post #9 of 16
The HT can likely hit near 1200 and still be stable.
You may, if you've not yet adjusted it, need to set your RAM to the next lower speed. That way it will have room to increase in speed along with the CPU bus increases.
    
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post #10 of 16
listen to the duke, he knows whats up. I knew there was some wiggle room with your total Htt speed, but i didn't know it was that much (In hindsight I guess it makes sense because alot of Mobos are supporting 2600MHz htt nowadays, and the Htt is dual channel, so 1200 in Bios would be 2400MHz...) sometimes I forget to think.
Anyway, you should be fine with you Htt at 1030MHz. Try bumping up the FSB a few more times and see where you end up. Your Htt should be fine at that multi untill about 235-245 is according to that. You'll probably end up needing to mess around with the ram before then.
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