Yes, a product page will soon be created for 12 pin PCIE cables. I already have the parts on hand and will have some photos soon. Unfortunately due to the smaller size of the connector and pins this will be offered as an unsleeved cable only.
Yes, all Corsair SF models use the same Corsair Type 4 pinout. The cables are interchangeable. The only difference between the gold and platinum versions is that the platinum models require the sense wires to be installed on the 24 pin.
I ask for your motherboard model so that the cables can be as close to the exact length needed from the PSU to motherboard as possible. If you already have some of my cables and are considering an upgrade, take a look at the 24 pin and EPS power connector placements from the current motherboard to new motherboard. If they are in the exact same position or close, the cables should fit.
I ask for your GPU model so that the cables can be as close to the exact length needed from the PSU to GPU as possible. The provided model must also include the manufacturer, as some companies orient the power connectors on the GPU in different directions.
EVGA/Nvidia Founder’s Edition/AMD reference cards have the power connectors oriented like the top card in the photo, whereas Asus/Gigabyte/MSI/Zotac/Sapphire cards have the power connectors in the same direction as the lower card in the photo.
Other variables are taken into consideration too, such as length and height of the card.
The sense wires are the double wires that are found on the 24 pin cable. These wires sense the voltage at the motherboard end and do not send any voltage of their own. Corsair, Silverstone, and Seasonic use four sense wires and EVGA uses five. They are used to monitor the 12v, 5v, 3.3v rails, as well as a ground (with two ground sense wires on the EVGA PSU).
Cables for Corsair SF Gold and Silverstone PSUs are still 100% stable without the sense wires installed. Myself and many of my customers have found their overclocks and undervolts to be completely stable without the sense wires with the above power supplies. However, they are required for stable operation with Corsair SF Platinum, Seasonic, and EVGA PSUs.
Although all Silverstone PSUs share the same pinout, I ask for the specific model due to the placement of the modular power connectors on the PSU being in different places across different models. There is also the size of the SFX-L PSUs to consider.
The 4+4 connector allows the connector to be separated into two 4 pin connectors at the motherboard end of the cable (just like the stock PSU cables). One of these 4 pin connectors can then be used on a motherboard that only has a 4 pin connector for CPU power. The connector can later be combined if the motherboard is changed/upgraded to one with a 8 pin CPU power connector.