Top of display missing in BIOS when using Display Port

[Howson]

Hi, not sure if this is in the correct section ...

Just got new parts for PC upgrade ( all from OCUK ) comprising of ...
MSI X570 Tomahawk (updated to latest BIOS)
Ryzen 5600X
Sapphire 6700 XT Nitro ( got this when Gibbo done that great offer, thanks OCUK )
16 GB Patriot Viper 3600 Ram
WD Blue SN550 1TB for Windows
WD Blue SN550 2TB for Games

Old reused parts ...
Noctua NH-D14 with new Noctua NT-H2 Thermal Paste
Super Flower Leadex Platinum 1000W PSU
Crucial 1TB MX200 SSD for general storage (not currently installed)
BENQ XL2730Z 144Mhz Monitor / supplied Display Port cable
New 8k Display Port 1.4 Vesa Certified Cable

When entering the BIOS using the Display Port cable, the top 2 inches of the screen is missing, when windows loads the screen is fine, also plays games no problem.

When entering the BIOS using an HDMI cable the screen is all there.

I've tried plugging into different ports on the card and it's exactly the same top of screen missing only in the BIOS when using Display Port, I've bought a new 8k 1.4 VESA Certified Display Port Cable and that is the same as well.

Anybody else had this problem? and if so how did you fix it

 

[JohnG7]

In the Monitor settings check the DP version is set to same as your GPU supports and see if any Monitor Scaling is enabled and disable it as the Bios will be a lower RES (about all I can think of for now).

 

[henson0115]

is your install an UEFI install or not and do you have CSM set or not? likely some kind of CSM issue with the GOP.

 

[NutritioN]

I have BIOS display issues with a plain 6700XT, but it's more like corruption of the whole screen. Cable/port doesn't seem to change it, but I had black screen issues until I forced a lower PCIE gen in the BIOS. Is your 6700XT direct into MB or plugged into a riser? As you, games and Windows displays fine.

You could try forcing PCIE gen to gen 3 or 2 and see if it has any impact. Look in Settings -> Advanced -> PCI Subsystem Settings

 

[Howson]

There's no options for Display Port settings on the monitor apart from selecting it from the menu list of which input DP / HDMI / DVI / D-SUB

Display Mode Setting on Monitor Menu is Full

Monitor Scaling in Windows is set to 100% (recommended)

Install is UEFI

Tried PCIE Gen on Auto / Gen 3 / Gen 2

 

[JohnG7]

Install should have nothing to do with it, this is before Windows even loads so in your Bios nor is Windows scaling/Monitor scaling in your GPU Control Panel software.

My recent Monitors have had DP1.2 DP1.3 DP1.4 choices in their menus and also an option for scaling but probably would not cause that.