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Skylake Overclocking Guide [With Statistics] - Page 348

post #3471 of 11372
Incase anyone else is curious on the Corsair LPX kits as quite a few run them, I found this on the interweb.

As has been mentioned the kit can be Hynix (Ver5.29) or Samsung (Ver4.23).

I was trying to open mine but it fell into the too hard basket, then I found the above and mine is v4.23 so based - if true - I've got a Samsung ICs.
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post #3472 of 11372
Quote:
Originally Posted by phoboss View Post

Hey guys,
I have a couple of questions, I hope you can help me with.

I have a 6600K on a Gigabyte Z170 HD3P currently running at 4.6 with a 1.325 VCore set in the BIOS.

At first I had LLC set to auto and it showed me 1.278V in HWInfo while doing the X264 benchmark.
Then I set the LLC to High and the VCore is now at 1.332V in HWInfo, are those settings correct? (Why was it running stable at 1.278V before? I find that very odd.)
I haven't gone to the max my cooling allows yet, but I'm pretty happy with what I got so far. I think I can maybe reach 4.8 or so. We'll see.

One thing I haven't figured out yet is why my VCore doesn't go down in idle. I couldn't find the appropriate setting in my BIOS for that.

And the other thing is I have a Temperature reading in HWInfo, I don't quite understand. See the screenshot below. It just says "Temperature 4" and it reaches 93°C. Does anybody know what that might be?

Or is there maybe a guide to all the different Gigabyte BIOS settings anybody might know about?

Thanks a lot!
Cheers!

Welcome on gigabyte side where the software Vcore is not to be trusted.

I have a UD5 but all gigabyte share almost the same bios and problem so far

First LLC to auto and NORMAL is the same thing, its mean OFF

When LLC is to HIGH you will go higher than what you set your vcore in bios, for me I set 1.395V manual in bios and this give me 1.392/ 1.380 in software under load no drop at all idle vs load but in reality if you mesure your voltage point or capacitor, you will have way higher vcore . mine is 1.422V under load and 1.4 on idle with a 0.3%+2d multimeter. ( check some of my previous post on that)

SO far for gigabyte you need a multimeter if you want to push the OC ,

Dont even try offset with LLC high, even when offset is set to normal its burst into 1.55V territory, if you want to try offset , put LLC to normal

Temp 4 is a glicth , I remove it from hwinfo a while ago, also other bug of hwinfo with our motherboard :

-Vcore burst into random low and high number (1.5 -1.6 even 2V) they are false reading my multimeter saw no burst like that, its also make the temp 4 go minus 94C, maybe the two are link together and that why we see vcore glitch
-VCCSA and DDR do the same thing
-PCH sometime go into -89c when vcore spike ( the one under Gigabyte ITE sensor, the Intel PCH sensor work flawless)

and your other question

my MB system temps stay near 35-38C ( I dont know where that sensor is at all) I have my back fan blowing IN slowly on my VRM with deflector because of waterblock there no air movement other than that, maybe it affect that area I dont know.
my PCH ( the chip between the video card and the sata port) 42 to 45 there no fan blowing there both video card are under water and there no air movement there,so if your hit 60C maybe there is a problem or the UD5 heatsink is way better than the HD3P I guess
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post #3473 of 11372
To all of you guys who are using HWiNFO64, the BEST monitoring tool available , I suggest to spare a couple of minutes and customize it to your own needs and liking smile.gif On default it shows some arbitrary, erratic, values but it is not its "fault", it has to do with what the motherboard sensors are providing. I own the three Z97 motherboards shown in my sig_rig and for each one of them I had to hide / disable monitoring certain values. If you see a temperature or a voltage value having a constant and absurd value, just right-click on it and select "Hide" and "Disable Monitoring". If you will face any serious issue you can always post your question at the [OFFICIAL] HWiNFO/32/64 Thread and the developer will happily assist you. If it is something serious please post the zipped debug file, as well.
Warning: Spoiler! (Click to show)
    
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post #3474 of 11372
Quote:
Originally Posted by CC268 View Post

Hmm...so what is the reason to run adaptive then? The thing with adaptive is I would be more comfortable running 4.8 GHz at 1.43V...but running 1.43V all the time I can imagine would definitely cause some wear...so I am now more inclined to stick with 4.6GHz at 1.29V.


Your C1E support was disabled in your first posts? I take it you have tried it enabled?

If adaptive isnt working then use offset or manual like other have said until fix.

Back on my sandybridge I always used offset myself, just be careful with voltage at high loads.

If you have tried this and I have missed the post then apologies.
Edited by llantant - 11/1/15 at 12:55am
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post #3475 of 11372
Ok, I run some trial and error and done some reading about the Vcore idling topic.

You need 3 setting to be enabled, to make it work:

1.) CPU SVID Support (this may be called something other on your board) have to be Enabled
This setting is recommended to be off for OC (and for a reason, more on that later). According to asus this setting:
Disable this item to stop the CPU from communicating with the external voltage regulator.

Let me quote someone form this forums: Warning: Spoiler! (Click to show)
Quote:
Originally Posted by Aphid View Post

From Sin0822's ultimate sandy-e overclock guide http://www.overclock.net/t/1189242/sandy-bridge-e-overclocking-guide-walk-through-explanations-and-support-for-all-x79-overclockers:

"What is SVID and how does it affect Overclocking?
SVID is a 3-wire digital communication protocol between the CPU and the PWM, it allows for the CPU to change its VID on the fly to fit the frequency selected. That is why you can increase the base frequency +/- 6-7 multipliers and the CPU remains stable, because SVID is increasing the VID without you knowing. Now this doesn’t stop unless you manually set the voltage, so when users use DVID offset, they should be aware that their stock VID really isn’t constant. That is why I do not recommend DVID with SB or SBe, at least not above 1.4v. SVID potentially can increase voltage to 1.52v on its own, but that has never really been seen. SB and SBe both have this 1.52v max for SVID."

This is the hardware side of dynamic vcore.

2.) Intel(R) SpeedStep(tm) have to be on Enable
Simply put this setting allows your OS to change the CPU multiplier and vcore when idle

This is the software side of dynamic vcore.

3.) Offset or Adaptive mode have to be used for setting your Vcore in the Bios.
Manual setting will simply overwrite everything above and will give you a fix number.

It is important to start low with the offset in both cases, set it then go into your OS and check your vcore in software. Use Prime95 to stress it for a min with low FFT to see your maximum Vcore. it is important to use the hardest test here, most stress test will not make your system sue the max Vcore. If its too low, go back and increase the offset a bit.

And here you will face your frist problems: you will need high vcore then you are used to with manual to get it stable.


3+1.) it is probably wise to use a lover (or no) LLC with this if you don't want some insane vcore spikes.


And the important part:
Why not to do this on an overclocked system ?

TL;DR if you are overclocking this this is just not recommender, it will make your system more unstable and you will end up with higher vocre, and more aggressive other settings to make it stable then without it.

First of all you lose control of your vcore setting, the OS and you motherboard's voltage regulator will mess with it, increasing and decreasing it as it sees fit. And they do a awful bad job about it as I could see.
- It made my stable system crash on idle because the vcore dropped too low
- It made my stable system crash when high load situation started and it could not change fast enough
- It kicked my Vcore above I'm comfortable with (I run 1,36v manual, and this thing kicked 1,424v under load for no reason)

(Probably all of this could be solved with some tinkering with the settings, but I don't like it )

Secondly the gain is minimal if you have a normal Vcore and normal idle temperatures ( I get 22-26c idle with 1,36 vcore) its just safer and more stable to have it on manual.

Thirdly with Intel SpeedStep changing your CPU multiplier can have a negative effect in benchmarks or in games where idle and load situations change frequently. It can cause stutters.

Fourth I would use this settings only when I have high vcore and I don't want it constantly on my CPU even when on Idle, but here comes the problem, with the setting above and with a high vcore, you are just asking for your chip to be burned, just imagine a situation when you have a 1,45 base vcore and your Mobo and OS figures its need more juice and kicks it up above 1,52.

Edit: One last thing I was mistaken about earlier. C states have NOTHING to do with idling. C states are for sleep and hibernation, not dynamic cpu speed and vcore changing, you can leave C stated off.

Edit2: I miss used the "throttling" definition, and was confused with thermal throttling. I was talking about the SpeedStep multiplier changing, I fixed it now.
Edited by Balu0 - 11/1/15 at 5:51am
post #3476 of 11372
You can't use Adaptive without SVID enabled. However, for manual mode you'll want it disabled AFAIK.

@unclewebb can come and teach us the basics of C states again but AFAIK you can't trust SW monitoring once these are enabled. Hope someone else does the same check as I did earlier and says their vcore drops in Manual as monitored via DMM.

I refuse to use offset, I like adaptive but I've grown to like manual now too and see no reason to move away from it.
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post #3477 of 11372
OK this might sound stupid, but where do I set the Vcore do adaptive or offset in the Gigabyte BIOS? I haven't found anything regarding this. I can only punch in a number or leave the Vcore on auto. Nothing that says anything about offset or adaptive.
post #3478 of 11372
Quote:
Originally Posted by phoboss View Post

OK this might sound stupid, but where do I set the Vcore do adaptive or offset in the Gigabyte BIOS? I haven't found anything regarding this. I can only punch in a number or leave the Vcore on auto. Nothing that says anything about offset or adaptive.

I believe in auto mode you can overclock using the percentage tab eg: 60% for 4.5g, this allows the voltage to drop with the speed of the cpu. Also i think normal mode gives you the option of adding a voltage offset?
I use the percentage tab in MIT to overclock my 6600k to 4.5g and it works well.
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post #3479 of 11372
Quote:
Originally Posted by mechwarrior View Post

I believe in auto mode you can overclock using the percentage tab eg: 60% for 4.5g, this allows the voltage to drop with the speed of the cpu. Also i think normal mode gives you the option of adding a voltage offset?
I use the percentage tab in MIT to overclock my 6600k to 4.5g and it works well.

So you just set the OC to 60% and thats it? Nothing else?
No Vcore or anything?

you know what? I think I might try to send this board back and get an ASUS Pro Gaming instead. This is all kinda annoying. Vcore not being right, no real offset/adaptive modes, Speedstep not working...
Edited by phoboss - 11/1/15 at 4:31am
post #3480 of 11372
Hi all,
Great guide, great thread and responses, thanks everyone, some of them have helped me along the way.
I signed up to just to ask a question, because I'm at my wits end.

I'm no stranger to overclocking, but this is my first new desktop build in years and years (since when north bridges were a thing), and I'm having trouble figuring out why my overclock is so unstable, and I thought you lovely people might be able to lend a hand.

Motherboard is a MSI z170i gaming pro ac (the quite new mini-itx form factor one, I've got a small apartment, and also though it'd be fun to see how much performance I could squeeze out of a small board), and an i5-6600k.

I've been trying to hit a measly 41x on the multiplier, but as I increase the core voltage, the system seems to get less stable.

At 39x, default adaptive voltage bios setting, and an average with a vcore of 1.12 under load, it's fairly stable. Passes a modest XTU stress and x264 encode stress test. Day to day usage no problem.

At 41x, adaptive voltage + offset 0.1v, an average vcore of about 1.2 under load, it passes a short XTU stress alright, but x264 stress triggers the "IA: Electrical Design Point" and "RING: Max VR Voltage, Iccmax, PL4" protection flags as read off in HWinfo, and drops the multiplier to x37 (and passes).

At 41x with adaptive voltage + offset 0.15, an average vcore of 1.28 under load, it instantly reboots on both XTU and x264.
Same thing at 41x and vcore override of 1.35V (average actual vcore of about 1.22 under load).

Package power on the stress tests never seems to get over 60W, and the temp doesn't seem to break about 48C at the 1.35 core voltage, and I wouldn't of thought i'd be hitting the 100A max i've got ICCmax set to, unless there's something weird going on.

Can anyone enlighten me as to what might be trigging those protections? And why it seems to get less stable at higher vcore voltages (but still well under spec)?

Also, I've been wondering, is there any chance it's actually the RAM crashing with just vcore and multiplier OC'ing? (Kingston hyperx ddr4 2666 c15, running at it's tightest 2666 jedec specs). I tried upping the dimm voltage 10mV, but it didn't make a difference, and i didn't want to damage them to test a theory (ie. guess)...
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