Question Multiple Gigabyte GA-H110M-H mobos broken after use

Foyezes

Commendable
Mar 26, 2022
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6
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We bought 6 identical used systems from a local store about 6-8 months ago for our school.

i5 7500 cpu
Gigabyte GA-H110M-H motherboard
cheap ddr4 ram and 128gb ssd
random PSUs that have no international reputation

Since we got the systems, we have had 3 motherboards fail. We have grounding on outlets and power bricks. Any idea as to why that happens?