[jibz]

For the GPU bridge you need the bridge itself and two links that adapt from EK waterblock to the bridge.

If you're using the top two x16 slots then you want the 2 GPU normal spacing bridge:
EK-FC Bridge Dual GPU Parallel SLI/Crossfire Cooling Option EK-FC Bridge Dual GPU Parallel SLI/Crossfire [EK-FC Bridge Dual P] - $19.99 : DazMode PC Watercooling Gear, Canadian Best PC Watercooling and Modding Store

And TWO links, one per GPU (note there are different links for Nvidia and AMD)
2xEK-FC Link R48X0/58X0/68X0/69X0/79X0 X-Fire Option EK-FC Link R48X0/58X0 Cross-Fire Cooling Option [EK-FC Link R48X0/58X0] - $13.69 : DazMode PC Watercooling Gear, Canadian Best PC Watercooling and Modding Store(AMD one)

Now that ends up being quite a bit more expensive than a single adaptor in series but it is my preference.
The cheaper solution to link between two identical blocks is:
K - Dual VID Connector, Adjustable 2-3 Slot Spacing K - Dual VID Connector, Adjustable 2-3 Slot Spacing [CNT-VDA34] - $14.99 : DazMode PC Watercooling Gear, Canadian Best PC Watercooling and Modding Store(comes in black too)



as for my temps with the super mega giant 180x3 rad I get low 40s on my GPUs(570s@877mhz 1.1v) and low 50s on my CPU@(2600k@5ghz,1.49v)