I'm sure it depends on which board. You should contact them to see if they have the model in stock. They were very helpful when I needed one. I cant remember how much but it was a fair price and plus shipping I believe.
They were very nice and very quick. I was surprised how quick I do remember that

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You can use new S5 Hash PCB ( 18 pin connector) with S5 Control PCB (16 pin connectors) Need only a 16 pin cable.
Picture of my water cooling S5 project
