DDR5 Memory Failure, dead dimms, sparking

i should probably be in bed but i got too curious so i started opening the ram heat spreaders.
there’s only 1 dimm that got fried and no sign on the PCB of where the power came from.
i could clearly see the discoloration even before i removed the thermal pads.

damage:



how it should look /image of one of the not damaged ones

now the big question is how did this happen, i don’t know but a friend of mine suggested that the heatspreader might have come in contact with the caps or vrms or whatever it is in the bottom of this picture

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