Usually even if a memory kit is not in the QVL, as long as it is fairly close to other items in the list, chances are extremely good that it will work fine. PS, by default, the DOCP setting will be off, if possible try enabling it. Since the fabric clock speed is tied to the memory clock speed, if the memory is running at the base JDEC settings, then it will have a significant negative impact on CPU performance.
Beyond that, if the RAM is reasonably stable, e.g., able to handle memtest for around 1 hour or so, then that WHEA error is unlikely to be caused by the RAM so frequently.
If you can test with a different storage drive, just to run windows and do a basic memory stability test. if it is stable, then it would be worth doing an RMA on the SN750.
While I have not used that specific board, I have used the SN750 on boards with that chipset before and did not encounter stability issues. though it is always possible to get a lemon.
Beyond that for NVMe when it comes to compatibility, since they all have to conform to specific standards, you are unlikely to end up with a traditional m.2 NVMe SSD that will have compatibility issues on a standard motherboard.
The SN750 is increasing greatly in popularity since it is no longer overpriced for its performance and write endurance. Especially when the driveis on sale for $100 for a 1TB SN750 first edition, it becomes the best price to performance ratio PCIe 3.0 m.2 SSD at 1TB.
In the past, it wasn’t as good of a value since they were charging just as much as the MLC NAND SSDs while offering TLC NAND. But today,if you can get the SN750 gen1 for $100-115, then you will have a PCIe 3.0 drive that will offer pretty much the max noticeable performance from the interface. when it comes to read performance. After that the next noticeable performance boost comes from Gen 4 drives (provided you have a gen 4 m.2 slot and a compatible CPU that will operate in that mode. Then the upper end gen 4 SSDs, such as the WD SN850, Samsung 980 pro, and the Gigabyte aorus Gen4 7000s 1TB. But if in a gen 3 slot, the performance benefits will not be present.