Hello 
As topic says , my first thoughts 
Improve SATA RAID performance
Enhance DDR  performance
RAM stability > low  , + 0 improve performance 
CPU stability > low 
SSD r/w speed lower ( - 5-10 %)  
RAID r/w speed higher  + 5-10 %  
Basically random BOSD when i try run any test AIDA64 , prime95 , the same in several games ...trade of SSD speed to RAID ? 
Over all  after 5h tests , if you run CPU on basic clock , and you want to you RAID 0 work semi properly - is ok BETA Bios ( but remember you main SSD will work slower) , im highly disappointed  
 Come on GB team ... you have work harder tbh , i did not pay 170 GBP for oc motherboard with crap BIOS  on which you cant acctualy oc ... or did i ?  
p.s. 
And still when i connect ANY fan ( i have 8 different ) to FAN2 slot - PC don't boot at all ....  
 p.s.2
Below image from F4 BIOS ... stable but well.. read before , you lose RAID 0  r/w speed 
