Overclocking trouble...

[RainMaQer]

As most of you know... I have an 800e on an abit slotket III. These are running on an Asus P3V4X.

Now the problem. I can run 120 FSB no problem... with only a .05 bump in vcore and its stable (1.75). In order to run at 124 FSB I need to up it to 1.85 to even make it to the desktop.

I'm currently running at 124 FSB with 1/4 divider and all... but I can't shut down the comp and then boot at this speed. I can at 120... but in order to get to 124 I need to boot at 120 or lower... then enter the bios and set the vcore to 1.85, save changes and restart, boot so that the vcore changes (doesnt change until AFTER post) then reboot and change the FSB.

If I just reboot It goes without a hitch... but if I shutdown and then press the power button... no post... I have to press the power button and hold it until it turns off... then power up and it will boot at 66 FSB and default voltage... causing me to go through this hole cycle again. It's completely stable... idle temp is 29 C.

Help please

 

[batboy]

Yep, those Asus motherboards are notorious about that cold boot bug. Even if you have the voltage set at a higher setting, it'll still cold boot at default. If you wire wrap the VID pins for a higher default voltage, that should solve your problem.

 

[RainMaQer]

Yep, those Asus motherboards are notorious about that cold boot bug. Even if you have the voltage set at a higher setting, it'll still cold boot at default. If you wire wrap the VID pins for a higher default voltage, that should solve your problem.

ah boy... I was hopin to never have to do that... I wonder what I should set it to?

 

[RainMaQer]

Also some other stuff I should have mentioned in my first post:

Sometimes one or two IDE devices won't show up during post. It usually happens at 124 FSB even though the PCI bus is at 31 MHz. Dropping back down to 120 fixed it... but it also happened another time... can't remember what bus I was at.

If I leave the comp off for ten minutes or so... the comp will boot at 66 FSB... even if I don't pull the processor out. On my P3B-F would do that if I pulled the processor out... it would say that I've installed a new one... don't remember what this says.

 

[batboy]

Well, the easiest way to do VID pinning in this situation would be to connect only two pins, and the easiest way to connect two pins is to use the pin hole method (see the overclockers.com article). There are three combinations for connecting two pins: VID2 to VSS for a modified default of 1.9v, VID1 to VSS for 1.8v, or VID0 to VSS for 1.75v. Any other voltage options require connecting more than two pins. For others reading this post, these options only pertain to Coppermine CPUs with an original default of 1.7v.

 

[RainMaQer]

batboy... do you really think this will take care of it? Is the vcore the reason it won't boot at 124 FSB?

 

[RainMaQer]

batboy... I would like to thank you. I took your advice and did the wire trick via the pinhole method... worked like a charm... put the vcore to 1.90 and no problem booting at 124 FSB Thanks bro... I owe you a

 

[batboy]

No problem, glad to help. Just watch those temps.

 

[RainMaQer]

No problem, glad to help. Just watch those temps.

Temps are still pretty good... they rose 2*C to 32*C but thats still ok... considering that this is only air cooling for now