I would use the GA Z 170 HD3 DDR3 so you can overclock the i5 6600k.
This message was posted on behalf of Intel Corporation
The Gigabyte GA-H170M-D3H motherboard is fully compatible with the processor i5-6600k. The processor supports low voltage DDR3 memories: DDR3L-1333/1600 @ 1.35V and DDR4-1866/2133 @ 1.2V.
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