I got some new RTX A2000 after seeing a build with these cards at my friend's but mine are all blower style GPU like my friends yet the rig shuts down on its own after a few hours of mining, what could cause this?.
your mobo pcie slots may not provide enough power.
or do you use all risers. if you use all risers how are you sending the power to the slots.
sata,molex,six pin vga.
remember the a2000 is fully power by the slot and the slot alone
about 65-75 watts per slot.
so risers with six pin pcie jacks are most likely the only way to run them.
unless you have a minerdude rig which is riser free but allows up to eight pcie cables to plug into the mobo.