Motherboard PCI spacing and GPU sizes

dual slot graphics card 2 5 slot gpu I have a dell g5 5000 that currently has a zotac 1060 6gb AMP that says it is dual slot I am looking at buying an msi 6600xt that also says 25 coins slot Note that with a 25mm thick fan installed at the bottom, the GPU thickness will be limited to 61mm, allowing for only a 3-slot GPU A3 Front mounted PSU

25 bonus 25 slot no worries on runnning 75W gpu in SFF that labels the PCIe slot as 50W max in height), and with power consumption up to 65w