^Im sure it comes darn close, does anyone have any benches of 570/480 oc'ed vs 580?
Maybe this article from Bjorn3d.com can shed some light:
"GIGABYTE GTX 480 SOC: Faster Than The GTX 580?"http://www.bjorn3d.com/read.php?cID=1998
"Add a little bit of overclock to the factory overcocked frequencies, and the user can enjoy GTX 580 speeds, at a lower price."
"The GIGABYTE GTX 480 SOC is more than just an ordinary GTX 480. GIGABYTE managed to provide a cooler that keeps the card at optimal temperatures while keeping the fan noise to the minimum. With high-quality components, cherry-picked GPUs, and excellent current noise reduction, overclocking becomes an issue of the past. Dual-BIOS is provided for users looking into liquid nitrogen cooling, with a dedicated BIOS for bypassing the cold bug issues with exotic cooling solutions. GIGABYTE's OC GURU overclocking tool also provides overclocking options that other software are currently unable to provide. Additionally, voltage measuring points are added on the PCB for overclockers to measure voltages in realtime."