Low FPS when 4k

So I know I'm not the first with this problem, but my laptop is barely over a month old and the specs are high-end. I connect to a HiSense TV as well but it doesn't matter, the FPS is the same.
When the resolution is at 1920 x 1080, the FPS is at a very nice 100+, but if I try to raise it to 4K, I'll be lucky to get it around 50. Absolute minimum settings take it to 60+ but it kills the point of getting it.
I know that MMOs are CPU-heavy so I know the trouble is not my GPU but my concern is that I have a multi-threaded CPU so there should be no excuse for this as well. I had a defective hardware issue a week back and they replaced everything, checked it (it was done on site so I saw everything) so I don't think my CPU is defective either.
I don't know what's up, but something's wrong and I need help. Here are my specs:
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OS Name Microsoft Windows 10 Home
Version 10.0.19042 Build 19042
Other OS Description Not Available
OS Manufacturer Microsoft Corporation
System Name THERMAFROST-ALI
System Manufacturer Alienware
System Model Alienware m17 R3
System Type x64-based PC
System SKU 09D1
Processor Intel(R) Core(TM) i9-10980HK CPU @ 2.40GHz, 3096 Mhz, 8 Core(s), 16 Logical Processor(s)
BIOS Version/Date Alienware 1.6.0, 10/20/2020
SMBIOS Version 3.2
Embedded Controller Version 255.255
BIOS Mode UEFI
BaseBoard Manufacturer Alienware
BaseBoard Product Alienware m17 R3
BaseBoard Version A00
Platform Role Mobile
Secure Boot State On
PCR7 Configuration Elevation Required to View
Windows Directory C:\Windows
System Directory C:\Windows\system32
Boot Device \Device\HarddiskVolume1
Locale United States
Hardware Abstraction Layer Version = "10.0.19041.488"
User Name THERMAFROST-ALI\brett
Time Zone Mountain Standard Time
Installed Physical Memory (RAM) 32.0 GB
Total Physical Memory 31.7 GB
Available Physical Memory 18.1 GB
Total Virtual Memory 36.5 GB
Available Virtual Memory 15.5 GB
Page File Space 4.75 GB
Page File C:\pagefile.sys
Kernel DMA Protection On
Virtualization-based security Not enabled
Device Encryption Support Elevation Required to View
Hyper-V - VM Monitor Mode Extensions Yes
Hyper-V - Second Level Address Translation Extensions Yes
Hyper-V - Virtualization Enabled in Firmware Yes
Hyper-V - Data Execution Protection Yes
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Thank you in advance to anyone who can help!