Have a look at this bug report I opened regarding the crash... 1096312 – Crash in Octane 2.0 benchmark demo. As I indicated it 'might' be AG related. If you can install the latest version, link is in my last comment, and see what happens when you run Octane 2. It's possible the 'bad' patch made it to the regular Nightly branch, possibly win32 and win64. I haven't tried these.