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Old November 26, 2010, 09:07 AM
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Default Intel Core i7 980X

Hey all!

About six months ago I purchased an Intel Core i7 980X. So far, its been a fantastic processor. Though, I have been concerned about the voltages. I currently own an Asus P6X58D-E. For some odd reason, it doesn't support dram voltages that are odd numbers. My ram is Kingston HyperX DDR3 1600 and its dram voltage is post to be set at 1.65v, but my motherboard will only allow 1.64v, or 1.66. When I set it to use the X.M.P, it sets my dram voltage to 1.66v. I herd anything higher than 1.65v may cause damage to my processor. I also read that you don't want to have the QPI voltage to be anything higher than 1.35v, but my QPI is set to 1.4v.

Am I causing damage to my processor? Is it degrading? Am I killing its lifespan?

Thanks for any help!
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Old November 26, 2010, 09:43 AM
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1.66Vdimm will not cause any issues. You do want to keep your QPI (Vtt) voltage as low as possible though. I would definitely try to lower it if I were you.
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Old November 26, 2010, 10:21 AM
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you sure you need that much qpi?

i'm running mine @ 4.5ghz mem ~900 7-8-7-20-60 and i didn't touch qpi, still @ 1.1
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Old November 26, 2010, 10:48 AM
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The X.M.P profile is what set my QPI to 1.4v. I went ahead and switched from using the X.M.P to "auto" and let my motherboard configure the ram, which set its speed down from 1600mhz to 1333mhz. I checked my volts using AIDA64 and says my QPI is now 1.25v and my dram is 1.56vs. Was my processor being damage/degrading or having its lifespan shorten from having my QPI to 1.4v's? Its been set that way for about six months =/
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Old November 26, 2010, 11:14 AM
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Quote:
you sure you need that much qpi?

i'm running mine @ 4.5ghz mem ~900 7-8-7-20-60 and i didn't touch qpi, still @ 1.1
Of course your Chip isn't the OP's Chip....hhhmmmm......I saw a ton of these "LowVoltage" my 980X at 4.5 - 4.6 Ghz Threads all over Evga.com about 6 months ago........they were all testing for stability using LinX Max Memory, which DOESN'T properly stress the CPU (all 12 Threads).....as soon as P95 Blend was run = Fail......no offense, but please post Screenshots of your stability testing results....

When I was running my 980X through a gamet of testing a few months ago, P95 Small FTT and Blend were the choice, not LinX (for Hexa Core)...

I experienced P95 Blend failing at as much as 6 hrs into testing.

Please...no offense mKultra, but folks claiming very high OC's @ very low voltages without stability testing to back it up can be very misleading for other folks pushing the same Chips


From Intel Max recomended voltages:
980X
vCore - 1.4v
Vtt - 1.4v

Not all these Chips will run with extremely low voltage ( I figure it all depends on the ability / quality of the IMC).....my 980X needs fairly high voltages across the Board for 4.15 stable, however I'm also running 12GB RAM. presently my vCore is 1.38vand Vtt 1.325v
Lowering your Uncore Frequency (try 1.5 - 1.8 X RAM) will allow for lowering QPI Voltage. This all goes out the window when your running 12GB RAM.

You can safely push your vDimm to 1.7v, but I wouldn't go higher....I run mine at 1.67v
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Last edited by rjbarker; November 26, 2010 at 12:32 PM.
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Old November 26, 2010, 03:06 PM
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no damage running @ 1.4v don't worry. 1.4 is still in the safe zone
XMP profiles should always be avoided if you know what to set in bios yourself, my advice of the day :P


i'm not claiming anything, it was just un example
1.4v is really high for an unlocked CPU which doesn't run high bclk and doesn't run high clocked RAM, i doubt any 980x NEED 1.4v for that kind of speeds THAT'S IT
i already said i don't use P95/linx etc, this Profile have been running rock solid for like a year so it's stable for ME, even if it crashed after 6-8hours of prime, why would i care if it doesn't crash while gaming/encoding/benching?
i don't fold, those are the most cpu/imc extensive task i do.

but i think i'll run it over night only to not hear a thing about p95/linx again
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Old November 26, 2010, 05:19 PM
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uuugghh....he did take offense...I knew it ;)
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Old November 26, 2010, 10:01 PM
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i wouldnt worry about 1.4v on cpu but no way would i run over 1.38 on qpi vtt volts 24/7
there is no need to got higher than 1.38 you dont need to clock ram higher that 2000mhz cas8
i would try running 1600-1700 cas6 @ 1.26-1.3v qpi;)
as for ram voltage i wouldnt worry even @ 1.67 but lower is better
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