I815&intell p3

[Ncogneto]

Any body out there have any information they can share with me about overclocking a p3? I currently have a p3 750 running at 110 bus completley stable>825 mhz. I am using a MSI 815e pro MOBO that does allow 1 mhz increments in bios. I know when I go higher that I encounter problems with my agp card running out of spec. I can find no settings for the pci/agp bus in bios or on the board. I know the problem is with the agp card do to a simular experience with oc'ing a cely on the same board. Replacing the card is not an option, it is a s3 savage4 video card, which is no gaming monster by any means but it is a special purpose card ( mirage illusionist 32 meg AGP for fixed frequency monitors) and is the absolute best at running my fixed frequency 21 inch sun monitor. I have jumpers on the board that give me the following settings for overclocking:


1) auto
2)66.6-->100
3)133-->66.6
100-->66.6
4)133--100

I know if I run at 133 fsb my agp will be back in spec.
I am assunning if I use the 133--100 setting that from there I can adjust my fsb down thus underclocking the agp card as opposed to overclocking it. As of this moment I am on the 100-->to 133 mhz setting but with every 1 mhz increse my agp speed goes up as well ( the bios also displays the current agp and pci bus speeds when doing this)

Ok now here is the problem I cannot get it to boot at the 133 setting even at 1.9 volts and don't think I should raise the processor voltage higher than that. Any ideas out there for any of you overclockers? ( p.s this is my second system I also have an athlon for gaming with a gforce 64 meg ddr vid card)

 

[Ncogneto]

wow, no p3 overclockers out there with any info?

A little bit of knowledge is a dangerous thing!

 

[Unolocogringo]

try using the 133fsb/100mem setting sounds like your memory cant take the 133 speed

 

[Ncogneto]

Thanks for the post, however I am using micron pc-133 SDRAM. also, there is no jumper for this as it is controlled in bios.

A little bit of knowledge is a dangerous thing!

 

[Guest]

I don"t get it? If you are running a 100 mhz processor at 133, and pc133 ram and your board supports the 133/133/66 setup then your AGP is in spec. Otherwise your board doesn't handle pc133 ram or your processor doesn't handle 133.
I currently am running a CUSL2 asus with the P3 600/100mhz at 133 giving me a 800 with pc133 ram and nothing is out of spec accept the cpu.
Please give more info on what your running. It sounds like your board only handles 100 mhz ram.

 

[Crashman]

OK, ok, My CUSL2 won't support underclocking the AGP port, it instead OVERCLOCKS the AGP from 101 to 132 at the 2/3 divisor, and then JUMPS DOWN to the 1/2 divisor at 133, then overclocks anything up from there. I suspect this is what yours does. You should have ordered the 700, because, at 133 bus speed, you would have 933MHZ at 66MHZ AGP. Then, if your board allows it, tried bumping it up from there.

 

[Crashman]

Oh, and by the way, the reason he can't use 133 is because his processor won't go to 1GHZ, common problem, most won't go over 980, Goppa

 

[Ncogneto]

No it is a nice board and will handle 133 just fine as well as the ram will handle 133 as well (I have settings to run the processor at 100 fsb while the ram runs at 133). You are right in assuming the proccesor will not handle the 133 overclock ( which would put my agp back in spec) this I know to be the case. So, this leaves me with maxing out at a 110 front side bus due to the fact that after that my vid card runs into issues. So, what this means is that the processor wont do 133 while the vid card wont do over 110, What I wanted to know is how to get the fsb to 133 and adjust down which would effectively underclock the vid card as opposed to running at 100 and adjusting up which overclocks it....understand?

A little bit of knowledge is a dangerous thing!

 

[Ncogneto]

So then what you are saying Crashman if I understand you correctly is that a 750 p3 is less likely to do the 133 fsb (997.5) while a p3 700 is alot more likely to do 133fsb(931) Is that correct? If could only get it to boot at 133 long enough to get into bios and clock down I would be all set.

A little bit of knowledge is a dangerous thing!

 

[Crashman]

Yeh, no prob. I've yet to see a 750 go to 1000 without extreme cooling. I've heard some rumors though. I've tried the 750, given up, and went back to my 700. The 750 I tried was a new retail unit I was installing in someone elses computer, but I just had to try it in mine! BTW, my board won't clock downward from 133, to get 132 you need to clock upward from 100. Hope you have better luck!

 

[Ncogneto]

I believe that my board will clock down from 133 it does clock down from 100 in that fashion, however I would need the chip to post at 133 first and stay on long enough to get into bios and clock it down and that has been the problem.

A little bit of knowledge is a dangerous thing!

 

[Crashman]

Too bad you can't get your hands on one of those little cans of freon!