Update: An engineer was over and replaced my board + gpu with another REV A04. He allowed me to replace the crappy thermal compound with some arctic silver and I've been running benchmarks the last hour. No crashes/issues yet but the XPS casing is turning really hot like it used to, so I'm not sure how long it will hold up. I'll be pushing it over the edge the next 24 hours and if something goes wrong again, I'll be getting a new XPS, which will probably go on sale.