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i7 930 vdimm

post #1 of 4
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What's max vdimm?

I know if it's within .5 of the QPI it's ok. But I mean if that were true. I can put QPI to 1.4 and I can make vdimm to 1.9.
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post #2 of 4
Quote:
Originally Posted by Shooting Star View Post
What's max vdimm?

I know if it's within .5 of the QPI it's ok. But I mean if that were true. I can put QPI to 1.4 and I can make vdimm to 1.9.
That's true but those voltages are for benching under water or extreme cooling. Nothing we often see on air or water for 24/7. If you are OC'ing and asking that question, I always stick to the temp I am comfortable with 75°C on full load.
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post #3 of 4
Intel states that for a i7 900 series DRAM voltage should stay within 0.5v of qpi/uncore voltage, but they also state the max safe limit is 1.837v (think thats the right amount, its close to that anyway). So i would say yes 1.9v dram would be ok for benchmark runs but i wouldnt run it like that for hours and hours. I personally wouldnt set my dram voltage over 1.65v for 24/7 use.
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post #4 of 4
http://download.intel.com/design/pro...hts/320834.pdf -- page 22.

Absolute max rating on VDIMM is 1.875. Ideally, you'd stay a bit below this, no matter what the VTT.

1.8 vDIMM would be reasonable with VTT in the ~1.4v range.
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