XFX - AMD Radeon RX 570 4GB GDDR5 PCI Express 3.0 Graphics Card
Existing card 250mm25 cm9.57 inch.Hand Measured
Left to Right Width 2.75 inches (70mm)
Back to Front
7.5 Inch - 8 Inch (190mm)
Just remember power connector is coming out so will add.
13 Inch Top to Bottom (330 mm)
From TT100 Web site
https://www.thermaltakeusa.com/the-tower-100-mini-chassis.html
CPU cooler height limitation: 190mm
VGA length limitation: 330mm
320 mm of space available in case.
32 CM
12.75 Inch
4080 Power connectors
CPU and PCIe are different wire layout, not compatible.
Need 3 PCIe connectors.
12 Volt.
It seems I have 3.
One in card now.
2 extra.
Should not need to daisy chain.