yes there is but not enough for me
keep in mind that i am not very good at cable management but i was able to put all cable behinde motherboard tray with a little bit of force
If you have modular or semi modular PSU it will be alot easier (i have Seasonic s12ii)
Honestly i would not reccomend it to anybody but its you choice. And if you looking at G1 jsut because of side windows DONT the InWin logo on it really ruins.