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Kaby Lake Overclocking Guide [With Statistics] - Page 170

post #1691 of 2831
Quote:
Originally Posted by Duality92 View Post

If I'm to run up to 1.5v on my DRAM for my 7700K, what other voltages do I need to increase? This would be on a Gigabyte board.

I don't think this has been answered yet

gonna say none right now

if you need more stability for the RAM (as in the memory controller) you can dabble with VCCIO, however as this setting is about signal strength you could apply to much (or too little)
trying to find a golden middle path

Quote:
CPU VCCIO and CPU System Agent voltages are found in the Extreme Tweaker page (scroll down to the bottom of the page to find them). These two voltages are sensitive to changes because they are related to signaling. Applying too much voltage can cause instability

hint:
read Kaby Lake OC guide in Jpmboy's sig
while it is for Asus, its still worth a read even with having a different manufacturer
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post #1692 of 2831
Yeah, temps peaked at 80C. I lowered the VCore to 1.38 and it's stable. MOBO sensors show VCore Max: 1.48 Average 1.42. I'll try to get it stable at lower settings.
Edited by seven7thirty30 - 4/7/17 at 11:43am
post #1693 of 2831
Yep. LLC on 8 seems to be way too high level. Would drop it to 5-6 to see if it's still stable or drop the voltage a bit. Would not call it a 24/7 build unless you want to set your house on fire. Maybe set an AVX offset as it's not used in games only in rendering and a few other softwares but there aren't many. AVX instructions are faster anyways so even at lower clock speed it gets the job done faster.
    
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post #1694 of 2831
I have a strange situation going on that maybe you guys can give insight on. Started on this new build 7700K + EVGA Z270 Classified K, Corsair Dominator Platinum Special Edition memory (3200mhz 32gb).

I started the OC slow at 45, voltage on adaptive no offset works fine bump to 46 same thing no problems. When I get to 4.7 (with 25mV offset) or higher the stress test pass without problem. BUT, the system does randomly restart for no apparent reason. I'm using the stock XMP profile on the memory, the voltages all look fine. i guess the question is, is this something related to the hardware itself or do I need to increase the voltage more to stabilize the build? I'm now running at 1.307v max on realbench doing a 4 hour test and it hasn't rebooted thus far. It's strange that the only time I've seen it reboot is when it's not doing anything, stress test run all day without issue.
post #1695 of 2831
1.3 V is way too high for 4.7 GHz (unless you have a potato chip). Would drop it to 1.25 - 1.27 V. Don't use XMP until you get a fully stable system. XMP interferes with the memory controller on the CPU and could cause instability. First stabilize your system with default 2133 MHz ram at 1.2 V and default timings (or even 1 step higher) then overclock your memory step by step until you reach 3200 MHz. See where it crashes. When it does crash or fails to POST raise the voltage from 1.2 to 1.25 or 1.3 V. At 3200 MHz you might need 1.35 V. Also tighter memory timings require more voltage to be stable.

The other source of problem could be that while it's stable under load because it has enough voltage, when the load decreases so does the voltage and somewhere between idle and full load the voltage is not enough. Check your idle voltage settings as well and go for 0.8 - 1 V.

That's all I can think of. Surely the more experienced members will correct me or give you better advices biggrin.gif.
    
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post #1696 of 2831
Yeah I think that's where I'm messing up. Sorry, it's been many many years since I've done overclocking. I started with turning the XMP profile to 1 and then started the overclock. When I get home this afternoon I'll turn the XMP off and put the voltage offset back.
post #1697 of 2831
Maybe I'm also reading the voltages wrong too. the EVGA CPU-Z software is showing 1.288 to 1.307. DIMM voltage is showing 1.375 to 1.360. So many voltages to look at I don't know if I'm looking at the right thing or not.
post #1698 of 2831
HWiNFO64 on the Vcore is report 1.262 with 1.270 as max.
post #1699 of 2831
HWiNFO should report it correctly. Vcore will and should jump up and down a bit depending on CPU load. That's called Vdroop and it's normal. Reset your BIOS to defaults then SET AC and DC load line calibration to 0.01 and set LLC level on maybe 4-5. 6 and up will probably result in too much voltage compensation. After this adjust only the multiplier and Vcore on adaptive voltage until your temps are fine and your system is stable. Alternatively you could just set to fixed voltage and once you find the perfect value switch to adaptive mode to save some power. But it's all written down in the first post of this topic and it's pretty detailed even for a noob like me.
    
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post #1700 of 2831
Quote:
Originally Posted by FedericoUY View Post

Than won't affect your OC capability right?
no it won't, and avoiding phase shedding and core parking will increase performance. Basically, if you are using adaptive or offset, disable all c-states (freq and voltage will drop to idle levels). With manual override, the higher c-states will idle and then "sleep" cores but the voltage to any "awake" cores will be at the manual override. That's why it is called "override". smile.gif
Edited by Jpmboy - 4/7/17 at 3:41pm
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i7 5960X i7 6950X Asus Rampage V Extreme (STD and model-10) 2 GTX TitanX w/ EK Blocks & Backplates 
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Nvidia Tesla C-class 2 GTX Titan X Pascal (water cooled) GSkill 3200c14 TZs 8x8GB @ 3400c13 Intel 750 NVMe 400GB 
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