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post #21 of 27
It seems these Gigabyte boards are the only ones that can really push a Quad past 500FSB. They have som 'magic' with Quads, other brands do not have. Simple as that.
    
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post #22 of 27
Seems so. I retuned my sig rig over the weekend with some lower voltage DDR2 1100. (1.95V vs 2.1V) 'cause I had bumped it down to 4.26 after it crashed on some encoding a couple times. Back at 4.3 and it's solid as ever.

The machine I swapped that 1066/2.1V into had to be retuned after the swap, 'cause it became OCCT unstable at the same speed it's been running at for a year with the other RAM. I had to limit it to 1000 'cuase it was erroring at 1090 or 1066.

So many variables can affect stability. Both these RAMs should run the same, but obviously that's not the case in the real world.
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post #23 of 27
Quote:
Originally Posted by 2thAche;12813262 
Seems so. I retuned my sig rig over the weekend with some lower voltage DDR2 1100. (1.95V vs 2.1V) 'cause I had bumped it down to 4.26 after it crashed on some encoding a couple times. Back at 4.3 and it's solid as ever.

The machine I swapped that 1066/2.1V into had to be retuned after the swap, 'cause it became OCCT unstable at the same speed it's been running at for a year with the other RAM. I had to limit it to 1000 'cuase it was erroring at 1090 or 1066.

So many variables can affect stability. Both these RAMs should run the same, but obviously that's not the case in the real world.

Does the UD3P have Load Line Calibration?

Here is my latest findings in this matter when using my P5Q-E

LLC for me in the P5Q-E is not at good thing at all when overclocking.

at 4050MHz I have found that by disabling LLC I'm totally stable in IBT (Max Mem) when V-core is at 1.425v in bios. This drops all the way down to 1.312v in IBT at maximum load. This is perfectly stable. If using LLC I have to use 1.325v in bios. This makes IBT at max load about 1.34 volts. For lighter load it drops much and can cause instability. At 1.3v bios LLC enabled Windows would not even boot. However, I'm sure it would have been stable in IBT, as that would have given me 1.32v + under full IBT Load.

So by not using LLC and compensating the V-drop I get a more stable system with IBT getting away with a lower V-core.

Testing right now at 9x 460FSB = 4140MHz@V-Core 1.45v bios. IBT at full load is about 1.336v (Somtimes at 1.328v) at full load (Max mem). Now, if using LLC enabled at this speed I would have to select 1.35v in bios. Which gives a huge IBT Load volt. And not stable at Lighter Load.

I thought this CPU needed about 1.34v full IBT Load at 4 - 4.05GHz. Turns out I get away with 1.328v at 4140MHz! While ensuring stability at lighter Load.

So for me, with this board, LLC is really not a good thing while overclocking.




http://www.overclock.net/intel-motherboards/773046-official-asus-p5q-pro-turbo-pro-243.html#post12812585
    
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post #24 of 27
Quote:
Originally Posted by 2thAche;12812158 
Thanks for the link. I'm also looking this over:

http://www.overclock.net/3167191-post3.html

When I get the chance, I'm going to try that out on my E8400. Much different than a quad, but the same principals apply to getting the FSB/NB stable.

If you had a UD3 board we could probably have you at 4.0 easy if you can get 3.8 on an NVidia chipset...
Quote:
Originally Posted by turrican9;12812203 
It seems these Gigabyte boards are the only ones that can really push a Quad past 500FSB. They have som 'magic' with Quads, other brands do not have. Simple as that.

What's the problem about NV boards? This one was able to do 500FSB in reviews?
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post #25 of 27
Quote:
Originally Posted by SaltwaterCooled;12814217 
What's the problem about NV boards? This one was able to do 500FSB in reviews?

500FSB stable? I was thinking about Intel chipset boards anyway. Have no experience with those 790i boards...
    
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post #26 of 27
My 750i can run it, the 680i I had was never stable with quads.

LLC: I've always enabled it. If you click the links to the Q9550 below, you'll see it's dead on at 1.344 at idle (CPUz validation/after OCCT) and at full load (prime95 blend at 5+ hours).

The X48 my Q6600 is on can only do 435 FSB. Nothing will make it higher. I bought it 'cause in the REVIEWS it made 500+. I don't trust reviews at all anymore. Forum reports usually tell the truth.
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post #27 of 27
Quote:
Originally Posted by 2thAche;12815361 
My 750i can run it, the 680i I had was never stable with quads.

LLC: I've always enabled it. If you click the links to the Q9550 below, you'll see it's dead on at 1.344 at idle (CPUz validation/after OCCT) and at full load (prime95 blend at 5+ hours).

The X48 my Q6600 is on can only do 435 FSB. Nothing will make it higher. I bought it 'cause in the REVIEWS it made 500+. I don't trust reviews at all anymore. Forum reports usually tell the truth.

Yeah, no problem with the comment about reviews, this boad has been a rock so far though and lots of voltage options, it's mostly just me figuring out how to use them. I think it can do 4ghz though, once the Foldathon wraps up I'll get to tinkering.
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