I skipped 1902, but 2001 is the first BIOS for me where my ram works with XMP or at advertised speeds at all. Using 2x8GB Corsair Vengeance LPX 3000Mhz. (Yes, I have used my RAM at default speeds almost since skylake released)
I've had stutter on youtube videos because of graphics drivers, when I changed from Nvidia to radeon 290x. Can't remember how I fixed it but it might have had something to do with vsync.
I had similar experiences with my Maximus VIII Ranger. Was stable with 0801 bios even with overclock in OCCT linpack with AVX but with 0905 and 1001 kept crashing. I think going back to defaults with CPU and taking off XMP profile might have helped, ...