I was going to suggest trying them at a lower clock but seems like you might be out of luck.

It is pretty rare to see multiple fails like this, do a search for your ram, mobo, chipset CPU and bios and see if anything flags. Might even be worth messing with latency settings, XMP can do stupid things.

Anyone already running memtest probably knows enough to check stuff but just in case.

Assuming it's a reputable brand it's probably worth attempting an RMA, it usually has pretty long warranty.