One more thing. If I were to get that 8 to 6 pin converter would that give me the 150watts since all 8 pins are being converter?
No it still won't work.
The limitation is still designed into that graphics card's power circuit.
If you were to bypass the designed power draw limitation you will still be faced with the components that are spec'd for the lower power consumption. Forcing those components to try and handle the extra power will cause their failure (i.e. burn out). It may also exceed the current that the circuit traces on the graphics card's circuit board are designed to handle and will burn them out.