Dual Channel RAM: not booting

[rubefeli]

Hello there!

 

I bought a prebuilt PC with an i7-8700k, a GTX 1080ti (Palit Jetstream), an Aorus Z370 Ultra Gaming and 2x8GB Kingston HyperX Fury Ram (HX424C15FB2/8).

 

Yesterday i LMed my CPU and therefore opened the Case for the first time and saw that the RAM was put in two slots right beside each other, so dual channel was not active. I then tried to put the RAM into a dual channel configuration but this time the system would not even post (i tried all 4 possible combinations but had no luck). The slots are not faulty because single channel works in all possible combinations and there are also no bent pins and the CPU itself is perfectly even as well. 

 

Any solutions? BIOS is up to date.

 

Greetings from Germany to whereever you are!

 

Felix 

[TheRandomness]

Just a little sanity check, but have you tried resetting the BIOS before changing the RAM’s location? Who knows, maybe it’ll help

[Princess Luna]

check out if the CPU cooler is not too tight up, if it's squeezing down the CPU excessively it could harm it's IMC to the point of disabling one of the channels, I had this happen with an old locked i7 8700 build I had, the Hyper 212X was too tight up so the CPU while functioning perfectly normally only worked on single channel even with 2x8 as well and only got sort out after reinstalling the cooler when I sold the system.

 

I it is just for gaming you don't really need the dual channel it'll make little difference considering the other hardware, but that could be a way around it.

[rubefeli]

Thank's for the suggestion to loosen the cooler a bit. Unfortunately it did not help. 

Of couse i reset the bios. But this did also nothing. I suspect my mobo to be faulty.