ZOTAC's GeForce GTX 580 AMP! Edition comes at a massive core clock of 815 MHz. During our testing we also noticed that the card could overclock consistently higher than other reference designs, which seems to be thanks to a special binning process in the ZOTAC factory.
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips