Zotac Geforce GTX 570 Review
 

Zotac's Geforce GTX 570 does prove that is a direct competitor with any reference based HD 6970 at this given time. Through benchmarking and testing, both videocards won and lost during certain benchmarks and in the end, I can't and will not say one is better than the other. Regardless, Zotac's reference based version of the GTX 570 proved to be a great videocard and proved to work flawlessly right out of the box. The only hindrance would have to be the reference cooler which doesn't seem to be up to the task if you would like to overclock AND keeps things quiet and cool.

http://www.tweaknews.net/reviews/zotac_gtx_570/