Question Asus Prime B450M-A No dual Channel Post

[ss996su]

I recently built a Ryzen 5 2600x based build, Bought 4 dimms 4x8GB from hyper X and already had 4x8GB from corsair DDR4, I cannot see any post on dual channel slots A2 and B2 but have post and OS on A1 B1, my issue started when during my build while trying to remove a screw that was somehow so tightened by the manufacturer I stripped the screw it took me 1 hour to take it off with olive oil, in the process while using a drill to force it off it slipped and put a tiny dent on the MOBO, somehow everything works except dual channel but here is the trick, when i have single channel a1 b1 it works also a2 and b2 work on single channel? and all sticks work but never dual channel not even mixed or even the same brand

 

[ss996su]

All timings are correct in bios also set to 3200 even tried 1600 to be sure and worked my way up, no post if dual bbut post if single channel

 

[Calvin7]

I suggest you post part number(s) and/or link to all memory you have a question about.