Hello, right now i have a gtx 550Ti and a core i5-2310 processor and 4 gigs of ram, so i thought it was an upgrade time since it cant run games very well, here are the components i chose:

Graphics: Asus STRIX GTX 980 DC2OC 4GB

Processor: Intel core i7-4790K 8mb cache up to 4.4 GHz

Motherboard: Asus Maximus VII Hero

RAM: HyperX Kingston 8gb (2x)

Harddrive: Western digital 2 TB SATA III 64mb cache

Power supply: Gigabyte 650 Watt CZ-EFS65A-C3

Case: Fractal Design Define R5 Titanium Window

CPU cooler: Corsair Hydro Series H80i liquid cooler

Fans: Corsair case fan 140mm quiet edition RED LED

Operating system: Windows 8.1

Optical drive: ASUS SDRW-08D2S-U LITE Black

Since it is my first time building a pc (the last one was a pre-built one) i have a few questions:

1. Is the gigabyte 650 Watt power supply powerful enough to power this system?

2. Does the CPU cooler need a resevuar and if not then, do i have to fill it with water or is it already filled?

3. Do all these components go together like, power vise and connections and do all the cables needed come with the componets already?

I know im a noob at building since it´s my first time, but can someone help me with these questions?, Thanks in advance!