That PSU comes with four 6+2 PCI-E cables; each one can be used as either a 6 pin or 8 pin cable (for 8 pin you plug in both the 6 part and the 2 part together. For 6 pin, naturally, you plug in just the 6 part). So yes, that PSU can make four 8 pin connections.
Source: http://www.newegg.com/Product/Product.aspx?Item=N82E16817139025