Here comes from tuner log and also a screen of graph.
I just tried switching back to 1920x1080 but that does not help.
Card name: NVIDIA GeForce RTX 2080
Driver version: 26.21.14.4097
Tuning Date: 2019-10-28
Virtual device: Dx11 (Hardware)
The card and driver meets the recommended requirement.
Display Adapters:
NVIDIA GeForce RTX 2080(Primary)
Intel(R) UHD Graphics 630
Certification:
Hardware Available True
Hardware Recommended True
Status 5
Hardware ID 2
Hardware Feature Level 50
Software Feature Level 50
General Options:
Adaptive Degradation True
Discard Backfaces True
Dynamic Tessellation True
Generate Vertex Normals False
Handedness Right
Maximum LODs 6
Redraw on Window Expose True
Surface Tessellation Tolerance 92
Transparency MediumQuality
Additional System Information:
ComputerSystem
Manufacturer Alienware
Model Alienware Area-51m
NumberOfProcessors 1
TotalPhysicalMemory xxx-xxxxxxxx
Processor
MaxClockSpeed 3600
Name Intel(R) Core(TM) i9-9900K CPU @ 3.60GHz
NumberOfCores 8
NumberOfLogicalProcessors 16
Revision
OperatingSystem
Name Microsoft Windows 10 Pro|C:\Windows|\Device\Harddisk1\Partition3
OSLanguage 1053
ServicePackMajorVersion 0
ServicePackMinorVersion 0
TotalSwapSpaceSize
TotalVirtualMemorySize 76867408
Version 10.0.18362
DiskDrive0
Model ST1000LX015-1U7172
Name \\.\PHYSICALDRIVE0
Size 1000202273280
DiskDrive1
Model Micron 2200S NVMe 256GB
Name \\.\PHYSICALDRIVE1
Size 256052966400
DesktopMonitor0
MonitorManufacturer (Standardbildskärmstyper)
MonitorType Allmän PnP-bildskärm
Name Allmän PnP-bildskärm
ScreenHeight
ScreenWidth
DesktopMonitor1
MonitorManufacturer
MonitorType Standardbildskärm
Name Standardbildskärm
ScreenHeight 1080
ScreenWidth 3840
DisplayConfiguration
DeviceName NVIDIA GeForce RTX 2080
DisplayFrequency 60
DriverVersion 26.21.14.4097
PelsHeight 768
PelsWidth 1024
VideoController0
AdapterDACType Integrated RAMDAC
AdapterRAM 4293918720
ConfigManagerErrorCode 0
CurrentHorizontalResolution 3840
CurrentVerticalResolution 1080
DriverDate 20191016000000.000000-000
DriverVersion 26.21.14.4097