SSD Review discovered Gen 5 PCI-E SSD on Arrow Lake (Ultra Core 200) couldn't hit the 14GB speed like the previous Raptor Lake (14th Gen). This has been confirmed by both Asus and Gigabyte in lab testing. Intel is saying it's due to the longer data path in the CPU.
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Intel Core Ultra 200 Series Motherboards Are Not Achieving M.2 Slot Gen 5 14GB/s SSD Performance - The SSD Review
Truth be told, this is not the fault of motherboard manufacturers, nor is it that of SSD makers. It
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