Help with Liquid cooling loop

Hero11

Honorable
Aug 16, 2013
9
0
10,510
I installed a closed liquid cooling system by coolermaster, there CoolerMaster Seidon 120V, an I love it! So I want to put a custom loop in my computer this includes my cpu, and gpus! To start out here are my specs:

CPU: FX 6300 OC 4.5Ghz
CPU cooler: CoolerMaster Seidon 120V
RAM: DDR3 12gb of corsair
MOBO: MSI 970A-G46 ( I am replacing this with the ASRock 970 EXTREME4 very soon)
GPUS: Sapphire Dual X R9 270X 4gb (x2)
PSU: Coolmax 1000watt
HDD: WD black 1tb
SSD: PNY 120gb
CASE: NZXT Phantom Full Tower (RED)

So I want to do a full loop that includes the GPUs as well! But I have came across a snag and that is my case... I do not know how many radiators I need or I should just mount a 360mm raid on the top... I am looking for advice about the mounting in my case, as well parts. Thank you (TL;DR)