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Z270 Supercarrier Cannot Get Into The BIOS
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RED View Drop Down
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    Posted: 16 Nov 2017 at 5:59am
My problem occurs when I have two graphic cards installed at the same time. The ASRock logo or the options does not show up. If I press F2 to go into the bios, I get a black screen. 

So I decided to clear the CMOS. I removed the bottom graphic card. Before clearing the CMOS, I turned the power back on with only one graphic card installed and the ASRock logo appeared and I was able to get into the bios. 

I have tested the first, second, and third PCIe lanes one at a time. No problems occurs. 
I have tested the graphic cards one at a time. No problems occur there. I was able to get into the BIOS regardless of the graphic card and PCIe lane I used.

Any suggestions?

Motherboard: Z270 Supercarrier
BOIS version: 2.20
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parsec View Drop Down
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Points: 4996 		Post Options Post Options   Thanks (0) Thanks(0)   Quote parsec Quote  Post ReplyReply Direct Link To This Post Posted: 16 Nov 2017 at 12:45pm
Originally posted by RED RED wrote:

My problem occurs when I have two graphic cards installed at the same time. The ASRock logo or the options does not show up. If I press F2 to go into the bios, I get a black screen. 

So I decided to clear the CMOS. I removed the bottom graphic card. Before clearing the CMOS, I turned the power back on with only one graphic card installed and the ASRock logo appeared and I was able to get into the bios. 

I have tested the first, second, and third PCIe lanes one at a time. No problems occurs. 
I have tested the graphic cards one at a time. No problems occur there. I was able to get into the BIOS regardless of the graphic card and PCIe lane I used.

Any suggestions?

Motherboard: Z270 Supercarrier
BOIS version: 2.20



That is a strange problem, given the details. I've never heard of this in the forum that I can remember.

What version of Windows are you using?

What are the two video cards you use, just in case they provide a clue?

Do both video cards work fine when the PC boots?

I assume you are not using the Fast Boot option in the UEFI, set to the Ultra Fast setting?

May seem like an odd question, but what type of drive are you using as the OS drive?

Have you ever used the ASRock Restart to UEFI program? You run it in Windows when you want to restart the PC and go into the UEFI/BIOS automatically. It only works for Windows 8, 8.1, and 10. I use it all the time, very convenient. If it will work for you when using two graphics cards remains to be seen, but it would be an interesting test.

How did you install the 2.20 UEFI version, which method? You could try installing it again, using Instant Flash, in case there was corruption of the UEFI for some reason.
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Points: 8 		Post Options Post Options   Thanks (0) Thanks(0)   Quote RED Quote  Post ReplyReply Direct Link To This Post Posted: 17 Nov 2017 at 1:33pm
What version of Windows are you using?
I am using Windows 10.

What are the two video cards you use, just in case they provide a clue?
They are both Asus GTX 1070s in SLI.

Do both video cards work fine when the PC boots?
Yes. Both cards do not show any problems while booting into Windows. It is a smooth boot.

I assume you are not using the Fast Boot option in the UEFI, set to the Ultra Fast setting?
You are correct.  I left Fast Boot disabled.

What type of drive are you using as the OS drive
The OS is on a M.2 SSD.

Have you ever used the ASRock Restart to UEFI program? 
Yea I tried it. The ASRock Restart to UEFI program works great with one graphic card installed. When two 2 graphic cards are installed however, I am met with a black screen. 

How did you install the 2.20 UEFI version, which method? 
I used the Instant Flash method.  I will try installing it again tomorrow.
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Points: 26663 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Xaltar Quote  Post ReplyReply Direct Link To This Post Posted: 17 Nov 2017 at 1:59pm
Could you list your full system specs, including PSU model please.
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Points: 8 		Post Options Post Options   Thanks (0) Thanks(0)   Quote RED Quote  Post ReplyReply Direct Link To This Post Posted: 22 Nov 2017 at 2:23am
After taking parsec's advice, it seems like the problem is solved. I just want to make note that I had to install BIOS version 2.20 twice to reach this conclusion with no variation in my method of flashing, but I am ok with that. The problem is gone.

Thank you guys for replying to my messages
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Points: 4 		Post Options Post Options   Thanks (0) Thanks(0)   Quote vectorphresh Quote  Post ReplyReply Direct Link To This Post Posted: 03 Sep 2019 at 2:54am
I discovered the same problem as above after removing third card from the system. Putting the card back in resolved the issue.

Anyone know if there a specific slots to be used in 2 card configuration? Don?™t have manual to verify.
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Dear Vectorphresh,

Thank you for choosing ASRock.

Z270 SupperCarrier have 4 PCI Express 3.0 x16 Slots (PCIE1/PCIE2/PCIE4/PCIE5: single at x16 (PCIE1); dual at x16 (PCIE1) / x16 (PCIE4); triple at x8 (PCIE1) / x8 (PCIE2) / x16 (PCIE4); quad at x8 (PCIE1) / x8 (PCIE2) / x8 (PCIE4) / x8 (PCIE5)).
https://www.asrock.com/mb/Intel/Z270%20SuperCarrier/index.asp#Specification
With two cards, please install at PCIE 1 and PCIE 4.

Yours truly,
ASRock TSD
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Also make sure the monitor is connected only to the card in PCIE1 according to the manual. The manual can be found here:
https://www.asrock.com/mb/Intel/Z270%20SuperCarrier/index.asp#Manual
https://www.passmark.com/baselines/V9/display.php?id=99573335296
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Points: 4 		Post Options Post Options   Thanks (0) Thanks(0)   Quote vectorphresh Quote  Post ReplyReply Direct Link To This Post Posted: 26 Aug 2020 at 3:43pm
Has been some time since I posted here. My ultimate solution was to remove the bios battery. After removing the battery, the BIOS splash is always displayed. When I find some time I will check if it no longer has a charge.
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I have had this issue for a number of years and with various different GPU cards. Currently I am using two 1080 Ti's. These are water cooled so removing a card just to get to the BIOS is extremely difficult!

I have reset the CMOS and removed the battery multiple times. It seems to work only briefly for me (one or two reboots at most). Additionally, all monitors are attached to a single GPU on top slot.

I just emailed ASRock support but wondering if anyone here might have additional info or advice.
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