Note: this post focuses on the dilemma of extending 6-pin PCI cables, not splitting!
If you’re building a mining rig with the 6-pin PCIe risers, then you’re probably going to need an extender to connect both the GPU & riser off a single cable with 2x 6-pin connectors from the power supply.
Most of the 6-pin power cables included with premium power supplies have lengthy cables and they usually split into 2x 6-pin or 1x 8-pin + 1x 6-pin connectors at the end:
You can see from the above pic, that cable splits into 2x 6-pin connectors. This makes sense, since some graphics cards have 2x 6-pin connectors.
It’s also worth mentioning that the length of the cable between each 6/8-pin connector is relatively short – usually the power connectors are together on the GPU:
Riser card power dilemma
When you start building your rig and decide perhaps, “I’ll use 1x 6-pin connector for the GPU and 1x 6-pin for the riser card” – that is where you will run into problems.
The cable is too short to connect to both the GPU and riser card off a single split cable- it just won’t stretch:
Extender to the rescue
Not only does the extender cable make it easy to power riser and GPU off a single power supply cable, it also enables flexibility when connecting risers and GPU.
The example below; a single PCIe power cable was used from the power supply (that splits into 2x 6-pin connectors), and then an extender was added so the split 6-pin cable could be connected to the riser sitting above the GPU below – this connection wouldn’t have been made possible without the extender.