Need some help with crimson drivers problem

[pek2000]

Specs:

 

XFX R9 295x2 (15.12, see post)

asus sabertooth z97 mark 2

16 gig G. Skill PC3-10700 ram

 

No overclocking, I can run FO4 all day with no problems, with 15.12. I have been using 15.12 since I started playing FO4. Now, I got doom, and thought I'd try out vulkan, so I tried 16.1, then 16.2, then 16.3. All 2016 crimson versions (up to the latest 16.7) cause either an immediate ctd, hang on loading or play for about 4 min before ctd or lockup (usually a lockup where I have to hard-reset my pc). Doom ( I did find out that once you set either vulkan or open gl, you have to delete the game directory in steam to reset the video config) plays ok with the new crimson drivers, but not FO4. I have tried:

 

1. No mods, no difference with or without mods.

2. ddu before and after upgrades/fallbacks.

3. Other games, Civ 5 seems ok with all crimson versions, galciv 3 ok, too. at least for the amount of time I tried them out each time. Doom also, once I figured out how to switch between vulkan & open gl, turns out I vulkan gives me no real-world improvement in doom.

4. dxdiag has no errors.

5. card runs cool (never over 60), but then again I have 2 noctua fans on the radiator and no overclock/overvoltage). MB is not overclocked either, all stock.

6. windows logs show no errors prior to the lockups.

7. I tried both using the profile and disabling the profile in radeon settings.

8. Turned godrays down, and pretty much everything minimum in FO4 setup ( and kept default setting, since my gpu has no problems with everything maxed out), since it's easy to change. If it wasn't that 15.12 has been running great, I'd say that I have a bad gpu.

 

My google-fu is not up to the task of finding a posting with similar issues, the xfx forums have nothing (I do have a tac case open with them since I'm under warranty). I wonder if someone here has sufficient knowledge of the video side of FO4 to have a clue as to why ONLY 16.x crimson drivers cause a hang ( on my r9 295x2)with what seems to be only FO4. I don't have a spare gpu, at least not that will run with the same specs as my r9 295x2. I do have spare mb, cpu and ram (was going to build a pc for my son, but he ended up with his own, so I have some spare parts).

 

I don't HAVE to run the newest crimson drivers to play all my games, but sooner or later I'll get a game that will require them for something, and now I want to know why the 16.x versions crash FO4. May never find out, but inquiring minds want to know.

 

Thanks,

pek

 

P.S., please keep the amd hate out of the thread.