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Is it mt RAM or CPU that is requiring so my QPI voltage?

post #1 of 7
Thread Starter 
So here's the run down...

I started with an ASROCK X58 Extreme board, i7 940 C0 chip, and 8GB G.Skill Trident DDR3-2000. Board went bad, returned it to newegg. Then I switched to a MSI X58 Pro, same chip and ram. That board was a piece of crap. Then I finally switched to my current setup, a Gigabyte EX58-UD4P, i7 930 D0, and same ram but running 6GB triple channel instead of 8GB dual channel.

With every single hardware configuration I've had, my QPI voltages have been super high to run stable. right now I'm running at 4.01GHz and my ram at 1910MHz and I have to have my QPI voltage at 1.535v. Even at 1600MHz I have to have my QPI at ~1.395-1.415v. The common denominator with all of my hardware configurations has been the RAM.

I have upgraded to a water cooling loop and I want to push for 4.5-4.6GHz but I can't do it with these high QPI voltages. If I knock ram multiplier down from 10x to 8x and run it between 1500-1600MHz, at 4.2GHz I still need well into the upper 1.5xxv for my QPI.

Should I replace my RAM? If so, does anyone have any recommendations for good high speed ram that is known for running with lower QPI voltages?
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post #2 of 7
have you tried running one stick just to see if that allows you to lower qpi? I am unsure what qpi really does since I have never had to touch mine for my board and chip. Must be a ram thing since i leave my ram at stock settings
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post #3 of 7
I have the same problem, I haven't clocked any higher on my sig rig because I wanted to stop @ 1.4 v QPI. It's probably the chip since thats the only thing we have in common.

I'm running 23 X 161 with the ram @ 2:10. More bclk wants more QPI volts even with the ram at looser timings and lower speeds.

If anyone has anything on this it would be great. I have pretty much given up at this point and planned on staying @ 3.7

Edit: I missed the part about you swapping to the 930. That pretty much negates it being the chip.
    
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post #4 of 7
ask sin he prob knows exactly what that voltage does. There is a an explanation for what it does on his sb guide so its prob the same.

go to page 2 where it says voltages. vccio is qpi, According to link it has to do with ram. Try one stick and see if you can lower qpi. If so then theres your answer.

http://www.overclock.net/intel-gener...uide-p67a.html
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post #5 of 7
I've never overclocked a first gen iSeries chip... So don't yell at me for being stupid please..

But isn't QPI related to NB (on die), if you keep increasing the Bclk won't that also raise your cpuNB?

Isn't there a multiplier for the cpuNB? Have you tried lowering it?


Meh I'm derp...
Quote:
The QPI is an element of a system architecture that Intel calls the QuickPath architecture that implements what Intel calls QuickPath technology.[5] In its simplest form on a single-processor motherboard, a single QPI is used to connect the processor to the IO Hub (e.g., to connect an Intel Core i7 to an X58).

Edited by BallaTheFeared - 1/21/11 at 12:37pm
    
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post #6 of 7
Thread Starter 
Quote:
Originally Posted by ckybam3 View Post
ask sin he prob knows exactly what that voltage does. There is a an explanation for what it does on his sb guide so its prob the same.

go to page 2 where it says voltages. vccio is qpi, According to link it has to do with ram. Try one stick and see if you can lower qpi. If so then theres your answer.

http://www.overclock.net/intel-gener...uide-p67a.html
QPI voltage is the voltage for the memory controller. Since i7s have IMCs (integrated memory controller) that voltage is on the chip. So I don't want to push it too hard or it could actually damage the chip itself.
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post #7 of 7
Thread Starter 
Quote:
Originally Posted by ckybam3 View Post
have you tried running one stick just to see if that allows you to lower qpi? I am unsure what qpi really does since I have never had to touch mine for my board and chip. Must be a ram thing since i leave my ram at stock settings
I haven't tried that, but I may here soon.
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