Yeah no luck fixing this so far.  Has nothing to do with Virtual mem or ram at this point.  8GB of ram to enable HBCC.  8GB of Virtual mem per card to run xmr-stak-amd with the intensity settings to hit 1900H.

Now something weird I've noticed.

Roughly every 24 hours of mining the two cards that refuse to enable HBCC and hash at 1300H suddenly hash at 1900H for ~10min then drop back down.

I am going to try to enable to web client for xmr-stak-amd and write a scraper to monitor the hashrate more closely than I can by randomly checking up on it.  Also appears you can have it write the hashrate out to a file, that might be easiest.