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GA-Z170-D3H Slowest Test DDR4-2666 Memory

GA-Z170-D3H Slowest Test DDR4-2666 Memory
« on: February 28, 2016, 08:54:41 pm »
GA-Z170-D3H (1.0)
Intel Core i7-6700K
BIOS Ver:    F4
Memory: 4x8 Kingston HX426C15FBK4/32
Windows 10 pro 
My new PC work perfectly, but I have strange behavior about the memory test.
Test read memory in Aida64,  SiSoft sandra, winsat show me low results on my DDR4 memory (about 20Gb/s)
In BIOS, info displayed that memory work correctly in 1333(2666mhz).
and why "Memory Enhancement Settings" in bios working in "Enhanced Stability"? According to the instructions as default is an "Normal". When I changed value to Normal, bios refused to start.