The graphics card needs 8-pin power connection and the motherboard obviously needs the usual 4-pin.
Problem is, my PSU has only 1 of each connection type and even worse, they are linked together.
The 4-pin CPU connector is all the way at the top of the mobo, a bit too far from the PCI-e slot where my graphics card is.
There is a dual molex to PCI-e 8-pin adaptor, but if the graphics card requires 8-pin, I don't want to accidentally fry it somehow.
Are there any 8-pin power extensions or something like that?
Or any other solutions?
Your video card itself comes with the dual molex to 8 pin adapter. Use it. You won't fry anything unless the PSU creates a problem. Btw, that PSU is crap. It has enough theoretically to handle your rig but it is not a very reliable unit. Change it as soon as possible. Get something better. Don't even need to spend much for that. A Corsair CX 430 V2 or an Antec EA 380D will easily power your rig while being very much reliable.