If you were to plug your GPU directly onto the motherboard, is there any place for an added molex power connector? No.
If you are only extending the PCIe connectors with extender cables, then you never need to cut, splice or add any molex non since.
Never.
The paperclip trick for the PSU works great. That's what I do, even in my little youtube video.
And yes I use uncut PCI extenders too.
So you are only talking about the X16 extensions right?
The X1 to X16 adapters are different and need power spliced in?
If it does indeed need power spliced in can anyone point me towards a guide or instructions or something.
I use x16 extensions and x1 extensions and I do not need to add power to anything. Not even 5970s which have dual GPUs.
However a 5970 will not run on an x1 PCI. Maybe it wants more power, or maybe an x1 cannot support a dual GPU on an X1.
Power comes from the proper PSU with the proper amps and plugs. (Non of those Molex to PCI plugs!) (I am unloading those worthless things on ebay. SATA to PCI adapters are also worthless.)