Dimm A1 & A2 not working

  EncomPL asd 16:26 24 Nov 2016

I had my ram plugged to 3rd and 4th slot (Dimm B1,B2) and realized that is running in single channel mode, then i replaced ram to the slot 1 & 3, and suddenly Q-Code 41/55 came out which is a memory error, i checked every possible combination single stick even borrowed ddr4 from my mate and it still doesn't work.

Last night i took my pc apart to check for any bent pins but none of them seem to be bent, and overall cpu has no visible damage on it, PSU seems to be fine i checked every possible component connected to the board, cleared CMOS, put the bios settings back to default even flashed it to the newest version but nothing seems to solve my issue.

What do you think may be wrong with my pc?

My specs:

Mainboard: MAXIMUS VIII HERO Z170 CPU: Intel i7 6700k @ 4.2ghz CPU Cooler: Cryorig H5 Universal RAM: 2x DDR4 G.Skill RipJaws V @ 3200mhz XMP GPU: Nvidia Gtx 970 PSU: Corsair CS750M SSD: Samsung Evo 850 HDD: Western Digital Blue 2tb

  Bris 18:34 24 Nov 2016

some info here and here. Care should be exercised when changing memory voltages and timings.

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