the wires are so thin
I had to cut the wire on the harness because I needed 4 pins molex instead of pci-e. There is just a flimsy copper wire the size of an hair inside of it. But it's working. My kit was in perfect condition. I'm loving this near silent miner.
Your pump leaked. Did you leave the fill cap open until the water heated up? Also do not overfill the pump because air will compress more easily than water.
Those having harness problems I love this little adapter molex to 3 pin adapter -
Have had two working great on that adapter.