The 4 to 8 pin adaptor does not run long enough to reach the mobo, and I cant plug a 4 pin into my motherboard and have it work.
Edit: Oh I see what your saying,
4 Pin -> 4 pin extension -> 4 pin to 8 pin adaptor -> mobo
4 pin -> 4 to 8 pin adaptor -> 8 pin extention
what case, motherboard, CPU, and PSU do you have?
a CPU 4-pin power plug should be able to power most stock CPUs