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Is Dynamic Voltage Safe?

post #1 of 7
Thread Starter 
Hi Overclock forums,

I am a new PC builder running a 3770K. I am gaining ground with understanding my system and good overclocking practices. I wanted to ask if applying a dynamic v-core introduces more wear to my 3770K than a constant voltage. I thought it was vis versa until viewing a video that implied constant voltage has been historically safer.

In addition, using a dynamic v-core of 0.1000 (which is my limit of stability @ 4.6 GHz), I observe idle CPU voltages (1.112-1.384V) spike above load voltage (1.328V). Could anyone explain?



Thanks in advance for the assistance!

jleon088

Intel i7-3770K (4.6 GHz)
Asus Maximus V Formula
2x EVGA GTX 670 FTW (stock oc)
16 GB DDR3 RAM (XMP: 1600 MHz, 1.5V, CAS 9)
Seasonic Platinum 1000W PSU
Corsair H100 Liquid Cooler, Corsair 650D Case
Windows 7 Home Premium
Edited by jleon088 - 9/3/12 at 11:16pm
post #2 of 7
No, offset/dynamic voltage functions fine and will not degrade the CPU. I recommend leaving it on because the throttling works so perfectly in almost all scenarios. Low voltage and clockspeed when not doing much, and ramps up perfectly (at least for me in my experiences) when more horsepower is needed.

As far as why you're getting a spike voltage like that it could be due to the LLC or load line calibration setting you have in your BIOS. Like on my Asus board the setting next to highest works the best (I think highest is extreme and I'm on high or something?) It could also be a misread if you're using software in place of a multimeter, or it could just be the way the motherboard delivers voltage.
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Beast
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post #3 of 7
Thread Starter 
Thanks for the quick response Dopamin!

It is reassuring to hear about the dynamic voltage. My next OC step was to adjust the LLC from the default "Auto" value. I will try the various LLC values with an eye for the second highest one. I'll keep the thread posted.


jleon088
post #4 of 7
I assume you have a Gigabyte board? I think they call it Dynamic voltage where Asus in my experience calls it offset voltage. Here is an example of how the Sniper 3 handles LLC levels from Sin's review. Experiences should be similar across their other boards (although not exact) and this should give you a rough idea of what to expect between the levels.

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post #5 of 7
Yea that chart is accurate, but I personally wouldn't go directly off that with an Asus board. I'm assuming you have an Asus from your signature. For my gigabyte board LLC are levels go from 1-10(highest), I have that chart if you do have a Gigabyte board. I don't want to hijack your thread but I was wondering with offset in my case @4.7Ghz vcore idle = 1.289 vcore load 1.310 and vid = 1.37 idle and vid load = 1.39 . Following the sandy stable guide it would come out to an offset of vcore 1.310 - vid 1.39 = -0.80 ?
Is it safe/normal to be that high or that much diff in vid, im going off the guide which states to take the load vcore from cpu-z and the vid from realtemp @ load and do the math above to = offset value. I'm using LLC6 which is giving me as stable as possible fluctuations, again following the guide way. So does this look right or did i mess up somewhere, because even in my bios once I get to around -0.60 or so it starts showing red like its dangerous.
Thanks my specs are in my rig build.
post #6 of 7
Thread Starter 
Hi Nizda,

No apology needed. I hope someone can gauge your issue! I do not understand what you mean by VID idle/load.

Good chart and link Dopamin3.
I have an Asus board that calls the dynamic voltage "offset" (there are a few too many names o.o). In terms of my idle voltage spiking, no LLC level seems to change the phenomenon. At stock operations, the fluctuation in idle voltages is very small (not spiking).

I am now at 4.5 GHz with 1.12-1.32 idle voltages and 1.27 at load.


jleon088
Edited by jleon088 - 9/4/12 at 2:15am
post #7 of 7
Yea I assume the poster that put up the chart assumed you had a Gigabyte board because offset is called dvid(dynamic voltage). Anyway their both the same thing, I think it goes back to some older bios versions I remember some people were forced to offset where their only option was to change dvid, instead of the newer uefi bios or newer award where you set it similar to asus by setting manual vcore then using offset. Anyway how I came to those values for the offset, was after reading a bunch of guides from sandy stable club. Basically after your stable at multiplier, volts, and have a pretty steady vcore where its not bouncing way up etc.. Your supposed to take 2 values 1 can be from cpu-z your vcore @load then take your vid value @load which you can find using realtemp or coretemp then subtract them and that should be your offset pretty much. Only thing is most people I see are always using + offset or low amount of - offset, i haven't found a case where it was so large a diff from the vcore @ load and the vid @ load. So I just want to know if that's fine or not, in the bios once I hit -.060 and down it tells me its dangerous to do.
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