Question Gigabyte X570S Aorus Master - can't get into BIOS

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Chriz

Senior member
Oct 9, 1999
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I just built a new PC with a Gigabyte X570S Aorus Master. I was able to get into the BIOS on first bootup, but after that the only way I can get into the BIOS is to clear the CMOS with the handy button on the back, then it lets me go in one time. If I try to go in again after that, it just kind of locks up I guess you could say? For example, if I tell Win10 to restart into BIOS through the recovery screen, it restarts and eventually just stops the boot process and my monitors go to sleep. Not sure if it's actually in the BIOS at that point and I just can't see it, or if it's just locked up somewhere. Same thing happens if I try to get in by mashing the DEL key on bootup. Anyone experience this before? Any tips?
 

RLGL

Platinum Member
Jan 8, 2013
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Have you tried the latest drivers for the card from the Nvidia website? Also, I remember when I set this rig up, I had to switch from one cable type to another to get the displays to work correctly. Another thing, there are many inferior cables on the market, I have had bad cables in the past.
 
Jul 27, 2020
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In the motherboard BIOS settings under the BOOT menu (on my board) there is an option called "CSM (Compatibility Support Module)". This is Enabled by default. Changing this to Disabled instantly fixed the issue. You may want to also try 'Auto' in case you have other non-UEFI devices connected but this may not work, it didn't for me.

Under your bios boot menu go to your "Boot from PCI-E/PCI Expansion Devices"

Select -> "UEFI Driver first" in the drop-down menu and you're done!

Do any of these work for you?
 

Chriz

Senior member
Oct 9, 1999
438
5
81
I partly figured out the problem after trying a ton of things. Whenever I enabled Resizable bar in the BIOS, it would automatically disable CSM support without telling me (apparently CSM support has to be disabled for the resizable bar to fully work). Re-enabling CSM support allows me to see the BIOS with DisplayPort. Very odd thing. With CSM Support enabled the Resizable bar says it's not enabled in GPU-z and the Nvidia control panel.







Do any of these work for you?
Weird that enabling CSM support worked for me, which is the exact opposite of what you're saying here.

As for the other setting, I could not find a "Boot from PCI-E/PCI Expansion Devices" or "UEFI Driver first" anywhere in the BIOS.
 
Jul 27, 2020
13,186
7,832
106
Re-enabling CSM support allows me to see the BIOS with DisplayPort. Very odd thing.
Great work. Maybe you can ask Gigabyte support about this now? They may have a technical reason for doing this or it may just be a bug, in which case maybe they can fix it in the next beta BIOS.
 

AnitaPeterson

Diamond Member
Apr 24, 2001
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Shmee

Memory & Storage, Graphics Cards Mod Elite Member
Super Moderator
Sep 13, 2008
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I did.
I see that you have to enable CSM support, but then lose resizable bar. Piss poor solution.
What hardware exactly are you running? Same motherboard? And what video card? There may be a separate solution that you could try, depending on your setup. Monitor and cable may also play a role.
 
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