Are these safe to use? My current PSU is 20 pin to comply with my motherboard, but as i'm getting a new motherboard ie Asus A8N-SLI SE will a 20 to 24 pin adapter suffice, or will i need a new PSU. Despite this board supporting SLI i won't be using it as of yet (can't afford another big ass 7800GT). I've also got the 4 pin ATX connector so its just whether or not the 20-24 pin will be ok to use.