So I got a 9800GX2 with 2 power connections and I didn't have an 8 pin adapter. I tried looking online to see if using 2x 6 pin connectors would be fine, but I couldn't find much. Finally I tried making an 8-pin adapter and it works perfectly!
Source: How to make 8-pin PCI-E Connector
First, take an old ATX connector (or similar) and cut off two pins from the end using a Dremel.
Cut the wires of the two pin connector down and strip them:
Now, instead of wiring these extra two pins directly to my power supply, I decided to wire it up to a spare adapter I had to avoid canabalizing my Power PC & Cooling 510. You could wire directly to your power supply, but you would end up making permament modifications (explained later). I ended up using a 2x 4 pin molex to 6 pin PCI-E adapter I had laying around.
Strip each of the black wires (ground) somewhere in the middle.
Solder the wires from the two pin connector to the exposed wires you just stripped. NOTE: I said solder, but you can get away with electrical tape; however, that’s the lazy way, which is more apt to fail.
Then, just cover the solder points with electrical tape and tape the two pin connector to the 6 pin PCI-E connector and VOILA! Your new 8 pin PCI-E adapter is finished! It would be a good idea to test fit your new plug before attaching the two connectors together.
Lastly, everyone wants to know, “Does it work?”
Heck yes it works! And it fits like a glove.
Source: How to make 8-pin PCI-E Connector
First, take an old ATX connector (or similar) and cut off two pins from the end using a Dremel.
Cut the wires of the two pin connector down and strip them:
Now, instead of wiring these extra two pins directly to my power supply, I decided to wire it up to a spare adapter I had to avoid canabalizing my Power PC & Cooling 510. You could wire directly to your power supply, but you would end up making permament modifications (explained later). I ended up using a 2x 4 pin molex to 6 pin PCI-E adapter I had laying around.
Strip each of the black wires (ground) somewhere in the middle.
Solder the wires from the two pin connector to the exposed wires you just stripped. NOTE: I said solder, but you can get away with electrical tape; however, that’s the lazy way, which is more apt to fail.
Then, just cover the solder points with electrical tape and tape the two pin connector to the 6 pin PCI-E connector and VOILA! Your new 8 pin PCI-E adapter is finished! It would be a good idea to test fit your new plug before attaching the two connectors together.
Lastly, everyone wants to know, “Does it work?”
Heck yes it works! And it fits like a glove.
I know there's one pin missing in newer psu's, but 3 missing?
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