Does anyone know if there are SMT "three pin headers" available?
These (and the PCIe-power connector) are the only through-hole parts, which I will try to avoid (to put the board on one big heatsink). If not, I'll use wires to daisy-chain, or "SMT-bent" pins or something.
Ente
Still thinking on that issue. I may put rectangular pads that allow soldering the pin headers horizontally, sticking outwards similar to the USB. There is SMT pin headers but they tend usually to be finer pitch. This 3 pin one left on the board is for the fan. So you could cut fan leads and solder them on but I'm still preferring some better approach.
The PCIe is more of a problem. I'm not aware of any SMT connector for that. But I will likely add pads behind it for direct soldering or whatever else I can find that is SMT. For this it may need a hole drilled in the heat sink, not all the way thru even, but enough for clearance.