First launch after AC power loss cause quick restart (POST FAIL?)

[k2nder]

Hi ho,

I just bought new pc:

CPU - ryzen 5 1600 (stock cooler)
MOTHERBOARD - asus prime b350 plus
RAM - https://www.morele.net/pamiec-g-skill-ri...rb-788194/ (g skill ripjaws V ddr4 3000 cl15)
GPU - zotac gtx 1080 amp!
PSU - seasonic focus gold 650
CASE - phanteks p400
HDD - iridium pro 240/hdd 750
WLAN - tl-wn881nd

everything works perfectly fine but when I try to run my pc after ac power loss it restart quickly once (looks like first POST fails) and then works perfectly fine until another ac power loss. I tried to reset cmos, change ram slots, change ram speeds, voltages downgrade bios from 3203 to 1002 and problem still appears. It looks like those ram's cause that reset.

My question is if this a real problem and if so what can I do?

 

[rocktalkrock]

In you UEFI bios under EZ Mode, is "D.O.C.P." Enabled or Disabled? Try setting it to Enabled.

 

[k2nder]

In you UEFI bios under EZ Mode, is "D.O.C.P." Enabled or Disabled? Try setting it to Enabled.

Yes actually I'm using d.o.c.p but no matter if it's disabled or set to profile#1(default xmp for that ram) problem still occurs;/

 

[rocktalkrock]

You say it "(looks like first POST fails) and then works perfectly fine". This may be normal for this motherboard and it only appears to fail at first POST.

 

[k2nder]

You say it "(looks like first POST fails) and then works perfectly fine". This may be normal for this motherboard and it only appears to fail at first POST.

Yes I came up with the same conclusion after so many tries. However I'd try another ram from my friend today and check if this story still appears.

 

[k2nder]

I've changed topic to be more accurate. I've also got feedback from one guy who has same motherboard and he don't have that issue ;/

 

[Lutfij]

1| Never downgrade your BIOS.
2| You should be on the latest BIOS update and on that note, you should be on the update with the AGESA code on it.
3| Manually input your ram's frequency, voltage and the timings instead of using X.M.P.
4| Does the reboot occur only once in the entire system's operation cycle?

 

[k2nder]

1. I think the same that downgrade move was kinda stupid... but fortunately all is ok
2. I'm on the latest stable bios now 3203
3. I tried every reasonable combinations for my ram (1.2-1.5v, cycles 15/17-15/17-15/17-35/37, mhz from default 2133mhz up to 3066mhz)
4. Reboot occurs only once when I loss ac power and then start my pc. Every other start look perfectly fine till I loose ac power again.

 

[rocktalkrock]

Since you can't find any way to change this behavior, it's probably just normal after a power loss. If you are still worried about this issue try contacting Asus Technical Support on their website and ask their opinion, they should have an answer for you.

 

[Lutfij]

If you're loosing power intermittently like a power cut from the main grid, then you should be looking at an UPS ASAP! On another note, you should follow the stickered/spec'd information instead of running around an imaginary bush.

Key in:
Frequency -
3000MHz

Timings -
15
16
16
35
rest in auto

Voltage -
1.35v

^ In your BIOS.

* What OS are you on?

 

[k2nder]

It's not like I'm loosing my power intermittently or sth. I just turn my PSU off when I go to sleep (1 time per day 😀)
I'm actually running my ram at params that you provided (default xmp aka d.o.c.p settings) except that I have 2966mhz instead of 3066mhz. On that setup I've run memest86 (2/4 pass 0 errors), stress test from aida64 (1h+ no failures) so it looks stable. Actually I'm on Windows 10.

 

[Lutfij]

When running memtest86, you should run it for at least 10 passes before ruling them out. Read through this and set it to 2933Mhz and see what happens.

1.5v is enough to kill your rams and the IMC as well which is why my expression might've seem like I lost it. Make sure your connectors are all plugged in snugly, while the system is powered down.

 

[k2nder]

When running memtest86, you should run it for at least 10 passes before ruling them out. Read through this and set it to 2933Mhz and see what happens.

1.5v is enough to kill your rams and the IMC as well which is why my expression might've seem like I lost it. Make sure your connectors are all plugged in snugly, while the system is powered down.

As i said I'm actually at 2933* I just wrote badly 2966;p
In memtest I passed 2/4 global tests so I've made through that particular mini tests from 1 up to 13 I suppose (it took me 1h summary). I used 1.5v just once to check if problem still appears;/

I'd actually want to mention the fact that I have some problems with that ram since begining. I remeber when I first ran my pc after build and it only read 8 instead of 16gb. Later on bios wouldn't start till I switched ram slots. Finally all works yes, but start wasn't pleasant.
I think I have to test some new ones just to be sure cause I got felling that this is the reason.

Back to connectors I've checked it like million times...

 

[Lutfij]

Are the rams in the right slots now? Updating the BIOS on the AM4 platform does end up being a small up hill battle.

 

[k2nder]

Now what's funny, it works in any combination ^^
I have also one interesting notice that when I remove all ram (and left slots empty) that problem disappear. Of course It don't get to bios because there's no ram but fans and motherboard are on (without that quick restart).

 

[Lutfij]

What does your motherboard manual state pertaining to which slots to populate when in Dual Channel mode?

 

[k2nder]

Standard options 1-3 and 2-4. I'm actually on that second variant.

 

[Lutfij]

Your manual state slots DIMM_A2 and DIMM_B2 requiring population in the event of availing Dual Channel memory configuration. Again, what slots are they in?

 

[k2nder]

Oh sorry for using myself shortcut. They're exactly in DIMM_A2 and DIMM_B2 (that's mine 2-4 mapping ^^)

 

[Lutfij]

Which slot is your wireless PCI-E Lan card occupying? That card doesn't have official support for Windows 10.

 

[k2nder]

Last slot PCIEX1_2. Damn GPU is 3 pcie wide so I had to put it there. Yes I know about that lack of support but despite that it works without problems.

 

[Lutfij]

It's probable that the reboot is a form of the system applying the settings for your ram(since it's an overclock) and thus the reboot after the AC power up. It's my assumption since most of your lingo has been...misused IMHO.

Regardless, see if removing the wireless card changes anything for you, if your friend's ram kit gives you a better experience and lastly let Asus know of your issue via email(and the seller you purchased the motherboard from). It's also probable that you may need to RMA the board.

 

[k2nder]

Yes sorry, I'm not a native speaker especially when it comes to describes issues like that ;/
I'll try remove that card, another kits and call asus center tomorrow.
Thank you very much for your time today 😉

 

[Lutfij]

Regarding your wireless LAN card, you should uninstall the drivers and then reinstall them in compatibility mode:
i.e: Right click installer>Properties>Compatibility tab>Windows 8

 

[k2nder]

Regarding your wireless LAN card, you should uninstall the drivers and then reinstall them in compatibility mode:
i.e: Right click installer>Properties>Compatibility tab>Windows 8

Card is plug and play so I don't have to install any drivers to make it works