the pci-e plugs are your 6 pin connectors. It actually has 2 6pin and 2 6+2 pin pci-e connectors.
Brand PC Power & Cooling
Model S75QB
Spec
Type ATX12V / EPS12V
Maximum Power 750W
Fans 1
PFC Active
Main Connector 20+4Pin
+12V Rails Single
PCI-Express Connector 2 x 6-Pin, 2 x 6+2-Pin
SATA Power Connector 6
the corsair does have 4 6+2 pin connectors.