When OC'ing my P4C I hit a wall at 240 fsb...why?

[superHARD]

I can use defualt voltage up to 240 fsb. Then no mater what voltage I go to (even up to 1.7v) It won't finnish a 3dmark01.

I have a IC7 mobo is there some settings you guys can help me with there?

I only post this as a problem cause I would think that a chip running stock voltage would be able to OC more once upping the voltage. But for some reason it doesn't help any. I have tried running the ram slower even though it is 4200 GeiL ram.

I am using a 350 Antec psu is it not big enough?
I also have the Zalman 7000cu (I think that is the model number (the all coper one)).

Can you guys help any or offer advise?

Thanks,
super

 

[Mikewarrior2]

did you ever try running with a 5:4 FSB/Ram ratio?


Mike

 

[superHARD]

Well I tried running the ram slower I think it was 3/2 just to be safe. But it still locked in the 3dmark. I can try it at 5/4 but will it help (prove) anything if it didn't work at a slower 3/2?

My temps stay at 50 C and I don't think that is too bad. Not bad enough to cause it to freeze anyways.

 

[Camofrog]

have you tried Prime95 benchmark software? it will put a full load on cpu and tell you if it is getting errors in mathmatical equations that it already nows the answer too, if you are getting errors i wouldnt go any higher with your O/C anyway unless you want probs.

also what kind of video card are you using?, is it O/C as well?

you are doing the cpu tests in 3dMark2001 right?

you really only need a big power supply if you have alot of lights and fans besides the regular comp stuff.

 

[superHARD]

I have not ran prime95...what will that prove if I don't get any errors?

The video card is ATI and I do OC it but I do run the 3dmark with the card at stock and slower and the puter still locks up running the 3dmark.

I only get into the first 4 benchmarks before it freezes so the cpu test doesn't get ran.

So upping to a Antec 430 won't help any?

 

[Duvie]

350 antec is a little on the low side for these p4s and ocing...I know cause I swicthed to a 430 watt back in my days of 2.7ghz...

List all your voltage rails as seen by the hardware monitor that was bundled with the IC7 system disk....

give me idle +12v,+5v,+3.3v as well as vcore set in bios and what it says on the monitor...

Then run superpi 32mb or prime95 for at least 10-15minutes and then tell me the same voltages...

 

[superHARD]

K right now I am testing to see how stable the ver 19 bios is.

After that I will regrease nb and cpu.

After that I will drop in the Antec 430.

After that...

I will get you thoes rail readings too.

 

[JimRaynor]

sounds like a real stable oc. To answer your question, probably cause you aren't stable.

 

[superHARD]

Originally posted by: JimRaynor
sounds like a real stable oc. To answer your question, probably cause you aren't stable.

Humm

Thanks for nothin!

Please keep your OT posts elsewhere too!

 

[JimRaynor]

I answered your question.

 

[lxie123]

Which cpu is this? if you are running a 3.0c or 3.2 c @ 240fsb .. you might not be able to get much more even if you switch the psu, and better cooling

 

[Duvie]

Originally posted by: JimRaynor
I answered your question.

Obviously he is unstable but the fact is why...It is clear and common sense that cpu do not hit a wall like that and all of sudden not work no matter the vcore....Even if he was at the limit of the default vcore most p4c chips will run another 5-10fsb at least running it up to as high as 1.65v actual....

In the past my 3dmarks could run on a slightly unstable system but not on an extremely flaky system which his would have to be to act like this.....

 

[superHARD]

It is a 3.0C

But I don't up the Vcore at all then I hit a wall at 240. That makes me think it is not the cpu holding me back.

 

[orion7144]

Also make sure your PCI/AGP bus is locked at 33/66.

 

[superHARD]

Originally posted by: Duvie

Originally posted by: JimRaynor
I answered your question.

Obviously he is unstable but the fact is why...It is clear and common sense that cpu do not hit a wall like that and all of sudden not work no matter the vcore....Even if he was at the limit of the default vcore most p4c chips will run another 5-10fsb at least running it up to as high as 1.65v actual....

In the past my 3dmarks could run on a slightly unstable system but not on an extremely flaky system which his would have to be to act like this.....

Yes you are right...that is what puzzles me.

Mabye the IC7 is just at it's max fsb for some reason.

I just reAS3'ed the NB and it still freezed on the first loby test.

 

[Duvie]

3.0c (15x240) = 3.6ghz.....

That is a high OC and I am flatly amazed that 350 even cut it this far. NOt that the watage is insufficient the fact that the amps on the 12v rail or sub 20 on that unit....

The 240fsb is not too high for the system as I have mine running at 292fsb and it completes UT2003demo at 3.6ghz 300fsb w/ 1.65v.....

I would also look at heat. You have case opened and maybe a large fan blowing on it???

 

[lxie123]

how sure are you that it's 100% stable at 240 fsb stock voltage @ 3.6 gig.

Have you done a 10 hour 2x prime 95 test. any lenghty video encoding tests?

or are you just basing the 240 stable statement on being able to loop 3dmark2001.

i would make sure it is not the cpu holding me back before spending more money on another psu or motherboard.

 

[JimRaynor]

nah man he don't need prime 95, he ran 3dmark a couple times he's fine.

 

[JimRaynor]

Yeah, and ALL 3.0c can handle 3.6 guaranteed right?

 

[lxie123]

Originally posted by: JimRaynor
nah man he don't need prime 95, he ran 3dmark a couple times he's fine.

If you consider running 3dmark a few times as being stable then my 2.6c can oc to 3.6 at stock voltage too.

 

[Duvie]

Originally posted by: JimRaynor
nah man he don't need prime 95, he ran 3dmark a couple times he's fine.

Your sarcasm amounts to thread crapping!!! MOVE ON!!!

 

[Duvie]

Originally posted by: lxie123

Originally posted by: JimRaynor
nah man he don't need prime 95, he ran 3dmark a couple times he's fine.

If you consider running 3dmark a few times as being stable then my 2.6c can oc to 3.6 at stock voltage too.

actually I doubt it!!! 3dmark will not run on that unstable of a system...Now maybe if you said you were running some sissoft sandra scores maybe but 3dmark a couple of times in a loop will have to be pretty close... I doubt you can make 150mhz since in another thread you list it at 3.45ghz....

Anyways you guys are not helping with the sarcasm....

I agree he should test the stabilty at 240fsb with default. That would lend more credence to the fact of the "wall" if it was stable and then just stopped....HOwever state it and move on.

 

[lxie123]

I'm not being sarcastic
3.45 is where i can pass 2x prime 95 for 8 hours.

I don't stay at speeds where my cpu cant' pass prime 95 and a lot of times when i can run just about EVERYTHING else fine.. prime95 fails.

@ 3.5 i fail prime after 15 min but i can still loop 3dmark without problems and sisoft sandra burn in too .. 3.6 i have not tried but i but it's still a logical expectation. I'll try it tomorrow. ( don't want to reboot and lose my queue in emule)

 

[superHARD]

How can it be heat? I have the Zalman 7000cu on it. Others have gotten it way over 3.6 with that exact same cooler.

How can it be chip? If it doesn't need a Volt bump or anything untill it hits 240 fsb.

I swaped to a Antec 430 and it still freezes at same place.

I only used one ram stick at a time and it still freezes in same place.

I moved the ram to the other dual channel slots and it still freezes same spot.

Large case fan didn't help either.

Any more ideas?

 

[BigJelly]

Originally posted by: superHARD
How can it be heat? I have the Zalman 7000cu on it. Others have gotten it way over 3.6 with that exact same cooler.

How can it be chip? If it doesn't need a Volt bump or anything untill it hits 240 fsb.

I swaped to a Antec 430 and it still freezes at same place.

I only used one ram stick at a time and it still freezes in same place.

I moved the ram to the other dual channel slots and it still freezes same spot.

Large case fan didn't help either.

Any more ideas?

I hit a wall with my 2.4c i can run stable @ stock voltage to 238FSB (but keep it at 235 because @ 238 got an error with prime 95 after 7 hours). I tried uping the voltage, relaxing the ram timmings, changing the ram/FSB ratio, and every thing else this forum could give me hints with, but couldnt break the wall.
So either my chip is not a good overclocker or its my motherboard. Either way i can encode video @ 111 FPS average (divx 5.11) and that's insain compared to my "old" p4 that could only do 48 FPS (divx 5.03).

Be happy with what you got. It could be worse.