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Why can't I raise my vcore?

post #1 of 9
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If I go *.075* volts up on my OCed conroe, the system is unstable. How does anybody get their vcore up to satisfy an OCed proc? Is this an indicator of a temperature problem? I'm running hot, at 52C idle.

Help a n00b out, plz?
    
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post #2 of 9
yea get some aftermarket cooling
    
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post #3 of 9
There's more than just going up in Vc with your system, you need to look at other several factors.

Ask misteroadster how he got his P5B-E to 540fsb.

Now, someone mentions this, the P5B-E limits your Vdimm to 2.1v but that's with the 1.01G rev whereas the 1.02G goes all the way up to 2.40v (See Link).

I'm not sure how different is the P5B-E from my P5B Deluxe BIOS but see if you can pull this off:

__________

I've let all the power saving features on (enabled) so that my CPU even overclocked will consume less energy and therefore the frequency will change from 2.0GHZ to the full 3.0GHZ when needed/full load.

I use a 2:3 ratio (which gives me a 1000mhz RAM Frequency), but you should run with a 1:1 ratio then the DRAM Frequency will read 664mhz or a 4:5 ratio which will be a 835mhz. And use a 2.1v or 2.20v for the 1:1 or 4:5 for Voltage RAM.
post #4 of 9
Thread Starter 
Quote:
Originally Posted by Nasgul View Post
I use a 2:3 ratio (which gives me a 1000mhz RAM Frequency), but you should run with a 1:1 ratio then the DRAM Frequency will read 664mhz or a 4:5 ratio which will be a 835mhz. And use a 2.1v or 2.20v for the 1:1 or 4:5 for Voltage RAM.
I'm at 4:5. I'm in the process of using orthos two-core beta to show this is stable. But are my temps way out of bounds or are there other people who run this hot? Edit: I've had it unstable as high at 3.25 Ghz.

Also my Vdimm won't run above 1.8 on my Corsair CM2X.
    
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post #5 of 9
Stop there dude. Don't let it run that high at idle, 54c is way too much. Get a Tuniq Tower 120 or Thermaltake Big Typhoon for cooling. I completely forgot that you were using the stock cooler and that is not good at all in my opinion.

Now, for the Vdimm, use a 2.1v with 4-4-4-12 latencies on a 1:1 ratio.

I don't see why your RAM shouldn't be running with anything above 1.8v, maybe you're not setting it right?

I had the same modules as you and they were fine with a 2.20v with 4-4-4-12 latencies at 450mhz, so maybe you need to change the ratio to 1:1 and the timings also.

But this time, instead of using a 334fsb, notch it down a bit, like 300fsb and set the RAM frequency to DDR2 600. With 4-4-4-12 latencies and a 2.1v.
You can do it.

What are the temps reading with AISuite?
post #6 of 9
Thread Starter 
Your settings seem well crafted and an excellent guidepost. But what are the advantages of slowing down? Longer CPU life? I'm not trying to argue; I just want to know. Thanks.

I've always been a kind of seat-of-the-pants tinkerer (through probably 15 builds); I guess you could call me reckless when it comes to computers.
    
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post #7 of 9
He's telling you to slow down for stability and the fact that your running with the stock cooler.
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post #8 of 9
The Argosy; looking last night at some reviews, there's also a "big" factor that will play into overclocking with your motherboard, and that is?

See if your motherboard is whether a 1.01G revision or 1.02G revision, if you have the first one? Then it sucks for overclocking from what I've been reading and sounds/seems as if you had that one. Though yours seems to be doing fine I guess, except for the timings.

For Rev 1.02G, there shouldn't be a problem raising the voltage to 2.1v and above but now I saw someone saying that their XMS2 800 CAS4 didn't like high voltage, and personally, I think I had the same modules you're using and to me, they were crap, they couldn't get a single mhz more pass 450mhz, after trying several settings, nothing.

So at this point it's either your MoBo or the RAM that could be the issues for you not to be able to raise the Vdimm more than 1.8v.

After 15 builds and you didn't know that Intel's own HSF is the worst thing Intel can pair a CPU with?
In my book, 1-I always use a 3rd party cooler and in this case the Tuniq Tower 120 is the best, except you can't find 'em in stock now because everybody bought theirs and 2-Never let the CPU idle at anything more than 35c and 50c-to-55c for full load with more or less than 10% above the stock Vc. when overclocking.
post #9 of 9
Thread Starter 
Quote:
Originally Posted by Nasgul View Post
The Argosy; looking last night at some reviews, there's also a "big" factor that will play into overclocking with your motherboard, and that is?

See if your motherboard is whether a 1.01G revision or 1.02G revision, if you have the first one? Then it sucks for overclocking from what I've been reading and sounds/seems as if you had that one. Though yours seems to be doing fine I guess, except for the timings.

For Rev 1.02G, there shouldn't be a problem raising the voltage to 2.1v and above but now I saw someone saying that their XMS2 800 CAS4 didn't like high voltage, and personally, I think I had the same modules you're using and to me, they were crap, they couldn't get a single mhz more pass 450mhz, after trying several settings, nothing.

So at this point it's either your MoBo or the RAM that could be the issues for you not to be able to raise the Vdimm more than 1.8v.

After 15 builds and you didn't know that Intel's own HSF is the worst thing Intel can pair a CPU with?
In my book, 1-I always use a 3rd party cooler and in this case the Tuniq Tower 120 is the best, except you can't find 'em in stock now because everybody bought theirs and 2-Never let the CPU idle at anything more than 35c and 50c-to-55c for full load with more or less than 10% above the stock Vc. when overclocking.
Or maybe BOTH the mobo and the RAM, right? I read how to tell if I have a 1.01 or a 1.02 but it was in passing and I don't remember now. Does anyone viewing this know?

My previous builds were not overclocking builds. I've done aftermarket cooling only for noise reduction in the past. At this point I'm planning to buy a Big Typhoon from Compusa so I can take it back if I want.

Thanks for taking the time to respond!
    
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