No new hardware but now 1 out of 4 RAM slots work

Hey guys I have some older tech here that could probably use some upgrading, but I have a AMD FX PC that I used for years then put all frequencies back down to stock passed it down to my younger cousin to play fortnite and league of legends on.

Anyways It ran fine for many months for him but recently it wouldn’t boot at all and threw a DRAM LED light, so I go ahead and start removing the sticks of RAM and find that out of slots: A1 - A2 - B1 - B2 only B2 the one furthest to the Right is actually reading at all.

I can install an additional stick of RAM in A2 but it won’t read in Bios (still shows one stick) and it won’t boot at all unless i have B2 installed .I tested all 4 Sticks in B2 and they will all boot but only from that one slot...

So basically only one of the 2 channels are working and on top of that, it won’t recognize what I put in A2 , only the stick of RAM in B2...

From what I understand a lot of AMD Motherboard (and maybe intel?) have the memory controlled from the CPU, is it possible years of overclocking did some damage to the CPU or Motherboard? It’s been running fine for months on stock frequency and just started the issue recently.

Definitely willing to try a few things so don’t be afraid to throw me some ideas, what I’m going to try next after writing this post is inspected the CPU pins and reseating it to see if it makes any difference.

TL;DR; all 4 RAM slots worked fine, now only 1 slot (furthest to the right) works, already confirmed all 4 sticks of RAM will run in that one slot.

specs are

Mobo: Asus M5A97 Evo CPU: AMD FX 8320e RAM: Samsung 4GB x 4 1600Mhz GPU: AMD Radeon R9 280x PSU: Raidmax 700w