Please don't tell me about the AMD Radon cards are better. They might be but I like Nvidia from personal experience. Now, the internal specs are exactly the same but I haven't seen many reviews on the Sig2 (Duel Fan), if you were me which would you choose? Like below are posted:
EVGA 02G-P4-2678-KR GeForce GTX 670 FTW 2GB 256-bit GDDR5 PCI Express 3.0 x16 HDCP Ready SLI Support Video Card
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130787
EVGA 02G-P4-3677-KR GeForce GTX 670 FTW Signature2 2GB 256-bit GDDR5 PCI Express 3.0 x16 HDCP Ready SLI Support Video Card
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130843
EVGA 02G-P4-2678-KR GeForce GTX 670 FTW 2GB 256-bit GDDR5 PCI Express 3.0 x16 HDCP Ready SLI Support Video Card
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130787
EVGA 02G-P4-3677-KR GeForce GTX 670 FTW Signature2 2GB 256-bit GDDR5 PCI Express 3.0 x16 HDCP Ready SLI Support Video Card
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130843