There are actually six different EVGA 670's among them only two are worth buying imo the other four are nothing special nor do they have anything over reference 670 that cost less. Asus 670 TOP the best 670 - 10.0 rating (only card ever to get a 10.0)
http://www.techpowerup.com/reviews/ASUS/GeForce_GTX_670_Direct_Cu_II/33.html
http://www.guru3d.com/article/evga-geforce-gtx-670-sc-review/23
EVGA SC Boost Clock is 1046 outta the box....stable at 1200 Mhz
EVGA SC gets 3DMark Score of 8691 outta the box and 9443 OC'd
Idle temp is 29C / load temp is 78C
Noise is 37 dBA Idle / 43 dBA under load
http://www.guru3d.com/article/asus-geforce-gtx-670-directcu-ii-top-review/23
Asus TOP Boost Clock is 1137 outta the box .... stable at 1280 Mhz
Asus gets 3DMark Score of 9340 outta the box and 9839 OC'd
Idle temp is 30C / load temp is 72C
Noise is 37 dBA Idle / 38 dBA under load
That makes the Asus 7% faster outta the box than the EVGA SC, 6C cooler and almost 1/4 as loud under load (every 3 dBA is a doubling of sound level). The FTW is slightly faster than the SC, leaving the Asus model w/ just a 5% performance advantage those are the only two evga 670 worth buying imo period.These are the two do not buy any other EVGA 670
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130787
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130785