Hello guys,
I found solution for my problem. I will describe it here, maybe will be helpful for someone.
First of all I loaded default settings in BIOS.
Next I placed memories in slots A1 and B1. In BIOS in AUTO profile I set DRAM Voltage at 1.35, VCCIO at 1.075 and VCCSA at 1.16. This wasn't stable in 100% (sometimes doesn't boot correctly), so I've been increasing the voltages by 0.05.
Finally I achieved stability with voltages:
DRAM 1.37 (Motherboard shows 1.38)
VCCIO 1.16 (Motherboard shows 1.18)
VCCSA 1.19 (Motherboard shows 1.20)
I switched profile to XMP with voltages above.
No errors in Memtest, no errors in Prime95. 100% boot up ! :D