DIMM Slots question

[madcowz64]

So a while ago I built a PC:

Intel 6700k

Asus Z170 Pro Gaming

16GB(2x8GB) G.Skill Ripjaw V series-3200

Evga GTX 1080 FTW

In my MOBO manual it reccomends slots A2 and B2 but upon building it it did not post. So I read online you could try slots A1 and B1 and that worked just fine and it is indeed dual channel. I was getting some instability with OCing the RAM with XMP and read that using the reccomended DIMM slots may fix this issue. So I switched the RAM into A2 and B2 and it posted, chances are I didn't seat the RAM correctly when I first built it.

So is there anything in particular I have to be aware of because I switched DIMM slots? Was I supposed to do something in the BIOS, essentially is my PC going to be fine with me switching the DIMM slots?

Second does this make any sense? Should XMP be more stable now that I switched DIMM slots?

 

[DRagor]

Well, motherboard recommends using certain slots for a reason, so it is certainly possible that it may have 'better' slots for XMP.
When switching RAM slots usually you don't have to do anything. However sometimes motherboard may have trouble noticing the change and may not be able to boot - in such case resetting CMOS is all that is needed to bring it back to action as it forces it to do full hardware scan on next boot and therefore it finds out that RAM has been moved. Also on some motherboards you may need to re-enable XMP after switch.