I was just wondering if anyone know what the limitations were for the P35 chipset when overclocking. The reason I ask is that I have 8GB of RAM and a Xeon Quad X3210 and the board (GA-P35-DS3P) will not run the memory at 1000 mHz (what the memory is rated at), but it would with a dual core. It will run Everest (CPU, FPU, Memory) stable for 15 hours at 400FSB, but when I try to burn DVD/CD, download, or extract, everything comes out corrupted. I was wondering if the chipset simply isn't able to handle being overclocked with that much "stuff" on it. It does run 100% stable at 333 FSB.

Anyone know anything about this?

have you upped the memory voltage? Most of the time the motherboard won't increase the voltage to the memory specifications when it faster memory.

Yes I have, I have it running always at either 2.0 or 2.1. The SPD put the memory at 2.0-2.1V Trust me, I've tried every different configuration out there, except the suicide voltages, which I will try when I get home from work.

i have my P35 running on 425FSB with 1.65V on it.and its running a Q6600 so there are even more stress on the Mobo then running a dual core.so anything under 500FSB is achievable.but most people can achieve 450FSB with 7/8 multiplier.

Yaozzers! That some high voltage! You run that 24/7? and what kind of cooling you using?

is that high?i think so myself!

but when i touch the stock NB heatsink its jus warm.i guess its somewhere around 28C or something.because its a really comfortable temp 2 touch!hehe

yep!24/7 running!100% stable with prime on small ffts and blend for 48hours!cant go wrong with that!!!

I'm assuming by 1.65V you mean the MCH??? What is the typical stock voltage on it? Also, the problem I am facing is that I am getting 15 hours Everest (CPU, FPU, Memory) stable, but the minute I burn a CD, download, or archive/extract, I get crc/verification errors. I've tested to see if they are real errors, and yes, they are in fact actual errors.

You might want to try some of the other testing/stability programs in common use, such as memtest86+ to start with, and Orthos/Prime95. What model number RAM are you using, and what is its spec voltage?

yeah the 1.65V is the voltage for the NB/MCH.the stock voltage on the modo is about 1.25V if i remember correctly.

and i wanna aski why you use everest to stress your system?its never as stress as Prime95 does.i guess the reason why you used it is because you want to take a shortcut since it so called "stress" the "full system" at the same time where as cpu and ram need to stress one after another.

am i right?lol

Actually, I heard that Everest tended to be a lot less lenient when it came to errors. Also, it is easier since I am too lazy to figure out how to run Prime95 on a 64 bit OS. Everest is natively quad core while Orthos is not (I believe Orthos runs the same that Prime95 does).

no you are wring there! Stress Prime 2004 Orthos Edition is run on dual core natively.so you need to run 2 copy of SP2004(thats what i do before and though Prime95 is the same)

but when i try out Prime95 you can select how many thread(copy) you want to run.much better then SP2004 Orthos.

get it!!!remember to check Error Checking in the menu!

i guessed it right!you are lazy!!!haha

I think you miss understood me, I mean that Orthos runs the same calculations that Prime95 does, not the same as in how many cores it runs on. But anyways, how much memory do you have? I heard of one guy having a lot worse overclocks with 4x1gb vs 2x1gb. Being that I have 4x2gb, i wonder if i am pushing the limits of the chipset with the quad core.

Also, what board do you have that has such a good NB heatsink on it.

Also, I have had Orthos run for around 12 hours before. Two instances with the affinity set (if not it gets confused for so reason and keeps switching back and forth among the same two cores). I'll try Prime95 tonight, I found a simple .exe, much easier than the stuff I found on the actual site.

remember to use the latest version(which is not availble in author's site) is 25.6 i think it was.try it out!its more then excellent!!!

I'll give it a try when I get home. Once with my current overclock, since I know it's 100% stable (8x333) and then again at 8x400.

Also, what do you suggest? Small FFT, large FFT, or blend? Or maybe custom?

do you know my optimal above average oc setting i tell everyone who new to oc?

do you need it?i dont think you need it!

I'm not new to overclocking, just new to overclocking Intels. My last two rigs were AMDs. Had an Athlon64 3000+(2.5gHz) and an Opteron 170 (3.0gHz).

i see.but i let you know anyway.

400x8 with 2.1v on ram sync with FSB with latency 4 NB+VTT/PLL@1.5V at least.remember higher ram ratio doesnt give you performance or speed gain.because the thing called MCH/FSB/NB in Intel's platform.its completely different to AMDs' so beware.

those setting i gave all have sucess and very good performance gain then 9x what ever FSB.but i jus give that to you as a baseline so you should look up from there.

good luck anyway!

Alright, so increased voltages didn't work. I'll try taking about 3 RAM sticks to see how it overclocks with just 2GB of RAM.

please make sure your bios is the latest beta build.as many gigabyte mobo dont work well with new cpu by default.

Yup, I upgrade them as they come out, I have F10 right now.

Final outcome, it cannot his as high of overclocks with quad core and 8 gbs as it can with only a dual core and less ram. To reach a higher overclock with 2gbs, i needed to up the pci-e voltage.