OC Failed in POST

[mao91]

Hey all.

Intel Core i7-5820k (26% OC from 3.3GHz to 4.3GHz w/ AVX enabled)
ASUS X99-A

Noctua NH-D15

Kingston HYPERX FURY DDR4-2400
Corsair RM750
Samsung 850 EVO x2 (RAID 0)

Occasionally, when I turn on my PC, I'll get a POST screen telling me "Overclocking failed! Press F1 to Enter Setup". So, I turn off my PC, turn it back on, and everything boots up fine.

Curious what could cause it to do this. I've considered dialing back the OC to 4.2 to see if that could help, but thought I'd ask here before I start dialing things around again.

[Leonard]

You may need some more voltage on the CPU. Try to pay attention to the MOBO's qLEDs to see what component is making the fail boot.

[airdeano]

i have a feeling could be the RAM XMP file is not to par (as usually the x99 auto

OC uses BLCK/XMP adjustments) or the VCCIN voltage (auto) isn't present at

POST (manually adjust to 1.8v for starts default it prolly 1.75v).

[Zackfoo]

it might not be a big problem actually. for me that happens too is kinda of like an error with the adaptive voltage motherboard apply. My overclock runs through stress test for 15 hours and stay on for another few hours and gamed for 3 to 4 hours without a single error and crash but once in a blue moon that happens too.

[Schoolofmonkey]

It sounds like something is lacking some voltage there.

 

I'm running a 4.3Ghz OC on my 5820k, currently my CPU voltages are set to adaptive + offset.

CPU = 1.180v with a +0.010v offset (1.198v in system)

 

Though I'm only running 2666Mhz ram, I've upped the ram voltages to 1.3v and lowered the VCCSA to 1.05v, I am not using XMP.

You're using 2400Mhz ram so you shouldn't need to worry about increasing the ram voltage to lower the VCCSA.

 

Also have you adjusted the cache speed, if you have you'll need to increase the cache voltages depending on the OC as well.

What LLC setting are you using, generally level 6 is the best.

Like airdeano said VCCIN also needs some manually adjusting, mine is at 1.920v with a 75% vdroop (MSI's version of LLC) which makes it 1.904v.

 

My system is completely stable.

 

I'd screenshot my BIOS settings but as you're using Asus, it won't help much MSI's Gaming 7 Bios is strange..lol

[mao91]

It sounds like something is lacking some voltage there.

 

I'm running a 4.3Ghz OC on my 5820k, currently my CPU voltages are set to adaptive + offset.

CPU = 1.180v with a +0.010v offset (1.198v in system)

 

Though I'm only running 2666Mhz ram, I've upped the ram voltages to 1.3v and lowered the VCCSA to 1.05v, I am not using XMP.

You're using 2400Mhz ram so you shouldn't need to worry about increasing the ram voltage to lower the VCCSA.

 

Also have you adjusted the cache speed, if you have you'll need to increase the cache voltages depending on the OC as well.

What LLC setting are you using, generally level 6 is the best.

Like airdeano said VCCIN also needs some manually adjusting, mine is at 1.920v with a 75% vdroop (MSI's version of LLC) which makes it 1.904v.

 

My system is completely stable.

 

I'd screenshot my BIOS settings but as you're using Asus, it won't help much MSI's Gaming 7 Bios is strange..lol

 

I ran ASUS' auto overclock (5-way optimization) utility, which is supposed to automatically boost voltage to accommodate for increased clock speeds (a decision which was made after watching this and this).

 

Here is a screenshot of my current settings:

 

[mao91]

Biggest mistake ever.

 

Why is it a mistake. AI Suite is fantastic for auto-overclocking. I may just need to make a couple fine adjustments here and there to stabilize things a little better.

[Schoolofmonkey]

Why is it a mistake. AI Suite is fantastic for auto-overclocking. I may just need to make a couple fine adjustments here and there to stabilize things a little better.

 

If you're not going to listen to us, listen to ASUS, they don't even use it in their guide:

 

http://rog.asus.com/365052014/overclocking/rog-overclocking-guide-core-for-5960x-5930k-5820k/

[mao91]

It sets the voltages high as fuck, y'know...

 

 

If you're not going to listen to us, listen to ASUS, they don't even use it in their guide:

 

http://rog.asus.com/365052014/overclocking/rog-overclocking-guide-core-for-5960x-5930k-5820k/

 

 

I have noted both of these things, and will look into making manual adjustments to get things more under control.

However, the article you linked to there does say: "It is worthwhile running the 5-way optimization to quickly gauge how well a CPU will overclock, even if you wish to overclock manually."

 

Also, this guide is for ROG, and I am simply running the X99-A. Will I experience much variation if I follow this guide for manual overclocking?

[Schoolofmonkey]

I have noted both of these things, and will look into making manual adjustments to get things more under control.

However, the article you linked to there does say: "It is worthwhile running the 5-way optimization to quickly gauge how well a CPU will overclock, even if you wish to overclock manually."

 

Also, this guide is for ROG, and I am simply running the X99-A. Will I experience much variation if I follow this guide for manual overclocking?

 

I sometimes wish overclocking was as simple as hitting 1 button, but to get the optimal overclock it's manual trial and error.

Even today I've been tweaking mine further, currently running my 5820k at 4.4Ghz with 1.25v, overclocked my ram from 2666Mhz to 3200Mhz.

None of which could of been done with MSI's overclock Genie or software.

I won't lie, I've had to do a few CMOS clears when I've gone too far, but that's all part of pushing your equipment to it's limits.

 

ROG is Asus, the bios might be a different color but generally the overclocking settings are the same...

[mao91]

I sometimes wish overclocking was as simple as hitting 1 button, but to get the optimal overclock it's manual trial and error.

Even today I've been tweaking mine further, currently running my 5820k at 4.4Ghz with 1.25v, overclocked my ram from 2666Mhz to 3200Mhz.

None of which could of been done with MSI's overclock Genie or software.

I won't lie, I've had to do a few CMOS clears when I've gone too far, but that's all part of pushing your equipment to it's limits.

 

ROG is Asus, the bios might be a different color but generally the overclocking settings are the same...

 

Yea, I don't want to get an "extreme" overclock. I'd be happy with getting 4.3 to be stable, or even dialing back to 4.2 if need be. Realistically, all I built my computer for was audio production and video editing. So, having an AVX-friendly stable system is more important to me than having a wildly overclocked system.

[Schoolofmonkey]

Yea, I don't want to get an "extreme" overclock. I'd be happy with getting 4.3 to be stable, or even dialing back to 4.2 if need be. Realistically, all I built my computer for was audio production and video editing. So, having an AVX-friendly stable system is more important to me than having a wildly overclocked system.

 

I hear you mate.

My chip can do 4.5Ghz, but it's not worth all the extra heat and voltages (1.3v) for 200Mhz.

There's a few of us that can do 4.3Ghz with these settings (worth a try for you).

 

Adaptive + offset.

CPU voltage = 1.180v

Offset = +0.010

 

It will give you a max voltage under HEAVY load (like stress tests) of 1.200v, but everything else it will be 1.198v.

We've found that stable on out MSI boards, so a Asus board with a OC socket won't break a sweat doing it.

 

It's a good manual starting point, usually I wouldn't mess with the ram speeds if you're looking for stability, because they can test fine but still be unstable when using different applications.

Though there is a downside to using a Ram XMP profile, usually they drive the VCCSA voltage way to high, mine would set it to 1.30v, this isn't needed and I can manually drop it back to 1.050v, this is best for CPU longevity.

Though in some cases you may need to up the ram voltage, which is perfectly safe (confirmed by Intel) to go as high as 1.6v, but for 2400Mhz ram it shouldn't matter, this is just a what if scenario.

I'm running my G-Skill 2666Mhz ram at 1.3v, it's rated at 1.2v, but I'd prefer a lower VCCSA than a higher one, plus Hynix DDR4 chips are rated to 1.6v..lol..

You can run the VCCSA higher, and Intel allow it, but Intel's onboard memory controller is only rated for 0.850v and was designed with 2133Mhz DDR4 in mind, so going 1.3v will work but if you're planning on keeping your system a while lower voltages are better.

Though many people go years with a super high VCCSA... 

[mao91]

Alright, BIOS pic coming up. This is what it's set at, per the AI Suite. It says max 2.7V, not sure why. But yeah. So how do I set this bad boy?

 

 

[airdeano]

once that line is highlighted, type in value you are needing in that register.

example, you want to change that line, type 1.95 then enter. it should

change that value and advance to next line.you could also press the

+ or - keys to change the value, takes a bit if you are making a wholesale

change.

[mao91]

I'm a little confused (understand, while I've been working with computers for years, I'm still new to overclocking). 
 

 

Adaptive + offset.

CPU voltage = 1.180v

Offset = +0.010

 

You say this (1.180v w/ +0.010 offset) but my board is showing 1.92v. To drop from 1.92 to 1.18 is a difference of 0.74 volts, which is rather drastic. Are you saying I should set this number to read 1.180v?

 

 

once that line is highlighted, type in value you are needing in that register.

example, you want to change that line, type 1.95 then enter. it should

change that value and advance to next line.you could also press the

+ or - keys to change the value, takes a bit if you are making a wholesale

change.

 

 

So wait, I want this line to read 1.95? Or 1.18?

 

 

I apologize for my elementary questions, this is my money-making PC and I can't afford to lose my CPU, so, you know, "measure twice, cut once."

[Schoolofmonkey]

 

You say this (1.180v w/ +0.010 offset) but my board is showing 1.92v. To drop from 1.92 to 1.18 is a difference of 0.74 volts, which is rather drastic. Are you saying I should set this number to read 1.180v?

 

 

It's using adaptive voltage, so what you're doing is setting a hard voltage for the cpu then an offset of extra voltage it can use when needed.

Some applications (like gaming) you might not need to draw all the voltage, so it'll still run at 4.3Ghz but not stressfully enough to start sucking a lot of juice.

Stress testing, or anything using AVX2 will draw a lot of power, and you're better off having it there for stability sake..

[mao91]

It's using adaptive voltage, so what you're doing is setting a hard voltage for the cpu then an offset of extra voltage it can use when needed.

Some applications (like gaming) you might not need to draw all the voltage, so it'll still run at 4.3Ghz but not stressfully enough to start sucking a lot of juice.

Stress testing, or anything using AVX2 will draw a lot of power, and you're better off having it there for stability sake..

 

Okay, so if higher voltage is better for AVX and AVX2 stability, then I really want to know what my voltage should be set at for this. That's all I want to know right now. I'm understanding the idea of how it works, I just need to know what voltages should be set to what. You know? There's a lot of voltages that can be changed in the BIOS and I don't want to break anything. The AI Suite gave me a good start, now I want to know what to change from here.

EDIT: I did change the offset to 0.010v and the OC voltage to 1.180 in AI suite and allowed it to write the changes to the board. Now when my system shuts down it sort of halfway shuts down and then the computer goes off. Ugh. Doesn't give me the "windows failed to shutdown" message at startup, though, so that's a good sign. Just being wonky.