maybe at full load use 77w chip = 6.5 amps strick review average full load power draw 173w = 14.5 amps 10 amps for the rest of the system
31 amps total a true 530w at 12v+ should be real close to 44.16 [that roeswell states 41 amps ]
all though I'm a bit skeptical on the cards max power draw some got it over 200w like 225w and some don't like what I used ??
so say 225w on the card that's still 35.25 amps total full system load and still with that a true 530w psu gives some overhead
I was just with a guy who had a 730w psu rated for just 48 anps on the single 12v [not good, was not a multi rail psu ] like he had a 730w psu putting out just as a 530w unit spesc ..
the new model is rated a bit better at 550w @ 45.5 amps
http://www.newegg.ca/Product/Product.aspx?Item=N82E16817182298
every time you overclock something you eat in to that psu amp overhead keep that in mind as well
wow this review show it at 310w that's a big increase in amp draw right there
http://www.tweaktown.com/reviews/6789/asus-geforce-gtx-970-4gb-strix-oc-video-card-review/index16.html
if it draws that then its 43 amps then you looking at maybe a 600w psu with 50 amps at the 12v for safety clean power overhead
so see how going overkill with a psu can help and not quite enough or just good enough can hurt in full load conditions ??
whay I say its hard for me to go less then a quality 750w psu on my primary gaming rig