Asus Non-Reference 480 4gb Custom Rom

Hello all. Been searching through this forum for a while but it appears no one has this model.

http://www.newegg.com/Product/Product.aspx?Item=N82E16814126135

I have copied the straps, but its a power hog. I have tried other hynix 4gb ROMs to no avail. I am looking for low power usage to fit 6 on a rig. Any help would be greatly appreciated, and I would tip .

Thanks!