This RGB Panel can be used for TX MATX ITX Gamming Motherboard and need only 5V 3pin connecter to light.

ATX Motherboard Size: 30.5cm x 24.4cm <==>12 '' x 9.6 ''
M-ATX Motherboard Size: 24.4cm x 24.4cm <==> 9.6 '' x 9.6 ''
ITX Motherboard Size: 17cm x 17cm <==> 6.7 '' x 6.7 ''