PCIe Gen4 NVMe on PCIe 3 0 - Performance impact

We suspected there may be a small performance advantage with high-end parts such as the RTX 3080 and 3090 when using PCIe over ,

2 x USB 3 x Audio jacks PCIe x16 ○ ASUS SafeSlot Core Audio Features ○ Audio Shielding ○ Premium audio capacitors ○ Dedicated audio PCB

nvme m2 ssd slot It looks like there are different PCIe specs Dell's slot can be used for Intel Optane memory or for a bootable SSD apparently PCIe now

nvme pcie slot You're referring to NVME based M2 SSDs, correct? But yes if the SSD is PCIE spec then of course the speed will be less when used on PCIE