Thermaltake Core P1 mATX / micro-ATX PCIe Card Bracket Adapter

thingiverse

Even though the Termaltake Core P1 is not made for it, you can fit an mATX Board into the case quite nicely (if you can live with the fact it will be held down with four screws only). But if you want to put a graphics / extension card into one of the lower PCI(e) slots, you need to replace the retailed 2-slot back panel with a longer (4 to 5-slot) version. I added M3 sink nuts to hold the cards in place (works like a charm fitting them with a soldering iron) but I guess a screw and nut setup will do the job as well.