I have a Razer Blade 16 laptop with an RTX 5090. I set the nVIDIA Control Panel and Windows Graphics settings to use the nVIDIA GPU for SVP and also selected the nVIDIA GPU in the GPU acceleration but as you see in this video, it is only testing the integrated graphics:
Laptops specs: Razer Blade 16 | AMD Ryzen AI 9 HX 370 | 64 GB LPDDR5X 8000 MHz RAM | GeForce RTX 5090 24 GB GDDR7 VRAM | Samsung ATNA60DL04-0 16" QHD+ 240Hz OLED Display + AOC Q27G3XMN 27" QHD Mini LED Monitor | WD_BLACK SN850X 4TB+8TB SSD | MediaTek Wi-Fi 7 MT7925 WLAN | Windows 11 Pro
NVIDIA Driver: 576.02