Yeah, the gd45 doesn't have any extra sata or firewire controllers. It's just the x79 pch peripherals, audio, lan and the usb 3 controllers.
The gd65 has more peripherals but is has slower usb 3 controllers and the price is quite high compared to the extras it has.
The GD45 relates more to the simple P9X79 in terms of extra peripherals.
Of course with the GD45 you have all those LEDs all over the board that show you how parts on the board are doing. It has a few voltage reading points too if you want to do more hardcore overclocking.
Hope you're having fun with it!