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oc'ing 7870, are these voltage spikes OK?/ 1.3V safe 24/7?

post #1 of 8
Thread Starter 
hi guys, so basically i'm using unigine heaven benchmark to test the card, It was fairly stable at 1.3 ghz and 1450 memory, @ 1.280V with a 20% power limit, However i noticed through the test a couple of times it'd spike up to 1.4v and or 1.35V for a moment, and oddly sometimes dip down to less than ~1V then level back to the main gpu V i have set. then the screen went grey (artifacted) when the voltage dipped again down to less than 1V of which i reset my computer at that moment.

Is that ok for it to spike that high momentairly? If i remove the power limit %, say back it to 10% does that mean it can give or take 10% increase or decrease voltage for a moment? like the "spikes"? is that the way i can control them or "how high" they could potentially go?

I'm on liquid so heat and cooling is not an issue, running the 1.28v and 1.3/1450 mhz I was a max of ~ 34C But the voltage spikes got me worried and what is the max safe voltage for general gaming? 1.3V? Thanks!
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post #2 of 8
With such low temps you don't have to worry. The cards are fine up to 1.30v loaded and those spikes are probably just readout errors.
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post #3 of 8
As long as temps stay low you should be fine. Though that much voltage could put a strain on the VRMs. Could be bad for long term.
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post #4 of 8
Thread Starter 
yeah i wonder on the vrms, and the spikes... but as my one question is, is does that power limit %, limit how much "give or take" voltage?
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post #5 of 8
power limit +20%= TDP +20%. Use it if you oc
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post #6 of 8
Thread Starter 
Ok well i'm going to try 1.3V @ 20%+ on 1300 mhz and 1450, I assume nobody will object to that rolleyes.gif
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post #7 of 8
Thread Starter 
Ok she wont do 1.3, but ive managed to zone it down into 1.26 ghz at 1.26V with 1450 memory. So I'm happy and i shall leave the oc at this
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post #8 of 8
Honestly, outside of benchmarks you won't really notice the difference between 1100/1300 and whatever you're running. Unless you like spending more time screwing around in OC software then playing games, it's not really worth it.
     
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