Asus Strix Z270i - Issues, Red CPU LED..

[Malkan]

Hey,

So i built a new PC a few days ago and today when turning it off and moving it to a new desk, issues occured. (Rarely turn my pc´s off). After having it moved to the new desk, i plugin all the cables and start the pc - Wont POST and CPU_LED is lightning solid red. Pressed reboot button, took 5-10 sec then it rebooted and started flawlessly into windows.

I can reproduce the issue 8/10 times (tested) by turning PC off, pull power-cord out and wait 3-5 min each time, then it most likely wont post and getting stuck with red cpu led. It did happen once when i tested just rebooting system a few times aswell. I have reseated CPU + Cooler, no joy. Cant spot any bent pins, looks fine to me. I have no OC, only XMP turned on (3000mhz Corsair) rest is stock + fast boot turned off. The PC works flawlessly in Windows, been running stress-tests (Realbench) for 2 hrs. Will run overnight aswell.. Works fine in games, been playing Wildlands all week without hiccups.

I tried to reproduce the error with XMP turned off = Bios completely stock. Only tried 3 times, it booted every time fine, i will try more times to reproduce the issue with XMP off. So far with what i have tested, it seems to be a issue with xmp/bios, any suggestions? Been using google most of the day and it seems to be the exact same issue that people HAD with Asus z87-a, been reading quite a few topics about that which match my issues very well.

Specs:
Asus Strix z270i-gaming @ latest bios 0607 - Same issue on both available bios.
Intel i7 7700k (Delidded with Rockit88 delid tool) - works fine, had to be done because of 85+ temps @ stock in games, 90+ Aida64.. Now around 65c.
16GB Corsair 3000mhz ddr4 - CMK16GX4M2B3000C15
Asus GTX 1080Ti
Samsung 960 EVO 250GB M2 + 2x 250GB 850EVO.
Corsair AX1200i PSU
Corsair H100i v2 cooler
Corsair Obsidian 250D

Hopefully someone have a answer 🙂 Thanks!

[lt_tenso]

Same issue here... 7700k, same board, if i unpluged from the wall he didnt boot... Red cpu led... Psu seasonic 650 gold... Ram gskil trident z 2800 c15 (F4-2800C15D-16GTZB)
I think bios update needed to resolve this... Almost forget, in tests works fine even with oveclock ram 3000 and c15 timings. Aida64.

[kingkajsdhaskas]

Malkan wrote:
I highly doubt it since we both have different PSU's but had identical issues. Have others with the evga psu reported issues?

Not that ive been able to find, im just grasping at straws trying to figure this out since its so random. Works perfectly, then no boot.. most of the time without any changes, just random.

Been scouring the net and seems that this bios (?) is a little flakey at the moment:

https://www.hardocp.com/article/2017/03/15/asus_rog_strix_z270i_gaming_motherboard_review/7

All that aside, I had a pretty good experience with this motherboard. The only issues I had were with the system not wanting to POST at 5.0GHz or similar speeds from a cold boot. I could reset, or restart within Windows all day without issues. When the thing wouldn’t POST, I’d have to power cycle the thing a couple of times and let the watchdog feature kick in. All I’d have to do is go into the BIOS and hit "Save and Exit" to get the system running again. It’s a minor issue, but something I found annoying. This may be corrected easily with an update to the UEFI BIOS and I see no reason why that can’t or wouldn’t happen before too long.

lt.tenso wrote:
Same issue here... 7700k, same board, if i unpluged from the wall he didnt boot... Red cpu led... Psu seasonic 650 gold... Ram gskil trident z 2800 c15 (F4-2800C15D-16GTZB)
I think bios update needed to resolve this... Almost forget, in tests works fine even with oveclock ram 3000 and c15 timings. Aida64.

Im betting all the errors we all have isnt really related to overclocking but just an early bios. We will see what happens in the future if im right or not

[lt_tenso]

I'm just a litle sad right now... Investing in first grade hardware and one second bios had been out and the problem still happening... Hope asus cares about this issues... There is some way to informe asus about this?

[kingkajsdhaskas]

The pains of being early adopters! 😞

[kingkajsdhaskas]

did some more digging and googling "asus z270 coldboot" or "asus coldboot bug" etc and you quickly find that we arent exactly snowflakes 🙂

[Malkan]

kingkajsdhaskasda wrote:
did some more digging and googling "asus z270 coldboot" or "asus coldboot bug" etc and you quickly find that we arent exactly snowflakes 🙂

Didnt the memory settings work for you? No issues anymore for me, done probably 40 hrs of stress test and 30+ coldstarts but i guess your memory could need different voltages/timings then mine did.

[kingkajsdhaskas]

Malkan wrote:
Didnt the memory settings work for you? No issues anymore for me, done probably 40 hrs of stress test and 30+ coldstarts but i guess your memory could need different voltages/timings then mine did.

All works perfect if i dont do coldstarts! If i do then no matter what settings yours/xmp/auto i get random boot fails, rarely with post error, just red light and i have to click reset wait a few seconds then it fires up like nothing ever happened. I have never gotten an error on memtest86/aida longest ive run those is 6 hours.

On another forum i got reports of other z270 users (atx probably) that had the same error but it got fixed with a bios update, so im hoping for an update soon.

[Silent_Scone]

kingkajsdhaskasda wrote:
edit: btw i tried running a Auto profile and selecting 3Ghz mem freq which had the mems running at 1.504v, thought that was a bit high :

kingkajsdhaskasda wrote:
i spoke to soon, this morning it didnt want to play anymore.. Ill have to try more settings.. *sigh*

The Extreme memory profiles from within the tweaker menu won't work with all kits. For 24/7 use with these profiles, remember that stability still needs to be tested from within the OS in the same manner you would with XMP settings (if you were implying you were trying these). These will have more aggressive timings, which is something you want to avoid at this stage.

Tweaking the memory voltage (VDIMM) from XMP shouldn't be needed, although it will help if the other aforementioned rails aren't dialed in well enough. Finding the SA/IO voltage that your CPU plays well with can take time - it really does vary from CPU to CPU, as is mentioned in Raja's guide. As is the fact that more can be equally as damning as less, so be sure to keep this in mind, too.

Stick with it 🙂

[Silent_Scone]

He likely means CL and tRCD. 3000 with a CAS latency of 18 is extremely lax

EDIT: Already responded, didn't see the third page 😉

[Chino]

If your memory is overclocked and your system fails to post properly, then your memory overclock isn't stable. Also each CPU is unique so copying settings from another user is usually a hit or miss.