Ok, the Cougar GX G800 in an 800 watt power supply.
How many drives in your system?
Hard drives, Optical drives, burners, Ect..
Then there is the processor, memory fans and what not.
I'd say you should at the very least have a 1000 watt PSU or more depending on what you
have in your system. Your video card alone requires at least a minimum spec 550 watt PSU.
This is why I mentioned powerful enough so your system is not under powered.
I've been doing this stuff for a long time and my first burner was a Yamaha SCSI burner back in 1994 which cost about $500 back then.