NVIDIA RTX 5090 GPU vs. Intel/Auto

I have the latest version of Davinci Resolve Studio and just bought a brand new $6K high end 18inch Sager pro laptop with the following specs. It's a powerful laptop.
Intel Core Ultra i9-275HX Processor ( 24 Cores, 36MB Cache, 5.40GHz Turbo )
NVIDIA GeForce RTX 5090 GPU with 24GB GDDR7 Video Memory
192GB Dual Channel DDR5 SDRAM 4000+ MHz - 4 X 48GB
Four - 4TB Crucial P3 Plus M.2 PCIe Gen 4 NVMe internal SSD storage (16TB total)
Windows 11 Pro 64-Bit Edition
My question is should I set the GPU and Memory menu to NVIDIA only, or have both GPU options checked on? I also have the CUDA selected on not auto.
Also, I have the laptop itself in the NVIDIA "physics menu" set to NVIDIA ONLY vs. Auto, CPU, or NVIDIA.
Intel Core Ultra i9-275HX Processor ( 24 Cores, 36MB Cache, 5.40GHz Turbo )
NVIDIA GeForce RTX 5090 GPU with 24GB GDDR7 Video Memory
192GB Dual Channel DDR5 SDRAM 4000+ MHz - 4 X 48GB
Four - 4TB Crucial P3 Plus M.2 PCIe Gen 4 NVMe internal SSD storage (16TB total)
Windows 11 Pro 64-Bit Edition
My question is should I set the GPU and Memory menu to NVIDIA only, or have both GPU options checked on? I also have the CUDA selected on not auto.
Also, I have the laptop itself in the NVIDIA "physics menu" set to NVIDIA ONLY vs. Auto, CPU, or NVIDIA.