> z420 Which slot should I install Matrox MXO2 PCIE Host Adaptor?
The general rule is "wherever it fits", but take a close look at the PCI-E slots on the motherboard, because the labelling could be '1X' or '4X' or '16X'. Putting a '16X' adapter into a '4X' slot could inhibit its performance.
> Also, does that long green plastic thing need to be reinserted before closing cover?
> Or is that just used when transporting the workstation?
It helps push the add-in cards "tightly" down into the slots on the motherboard.
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