Still having an issue getting H81 Pro BTC R2.0 to accept more than 5 ASUS P106 cards to run.  I do run my cards at a 45 degree angle to help with cooling. Can't add pic.

I have had mostly unsuccessful results with ASRock H81 Pro BTC R2.0.  Four motherboards purchased. One won't read memory slot 1. One won't read PCI power connector.  One won't read any PCI slot.  The best of the four I can get five of six (ASUS P106) cards working.  I am still in the process of swapping out H81's and am pretty tired of the process.  Purchased 12 cards and would like to run twelve cards. 

I love the sturdiness of the rigs you have.  A major difference in our rigs that reduces heat.  Willing to talk.  Can't seem to post properly here.