Question Memory channel stopped working

Sep 14, 2019
A few weeks ago my pc crashed without any error messages.
The dispaly froze and the audio glitched out and produced horrible noise.
When i tried to boot the next day it wouldnt post. Something on the board makes three barely audible chirping
sounds and then i get a 5 beep error code before it just cuts power and tries to boot again. This error code
means CPU failure as far as i know.
After a day of trying different things i found out that my first memory channel just stopped accepting RAM
modules. Only if no module is in channel 1 the PC boots as normal.
Since then i have both modules seated in channel 2.
This isnt a huge problem most of times but sometimes the single channel setup is quite noticeable (some games
run much worse) and the overall performance seems slower at times.

I reseated the CPU and tested the RAM modules independantly and the seem to be ok.

I dont know which steps i could take next so i hope someone has an idea what i could try to fix this,
thanks in advance.

My setup:

16GB G.Skill Value DDR4-2133 DIMM CL15 Dual Kit

Gigabyte GA-Z170-HD3P Intel Z170 So.1151 Dual Channel DDR4 ATX Retail

Intel Core i5 6600K 4x 3.50GHz So.1151 WOF