I just ordered a PSU, Cooler Master B700, 700W and I'm not sure, I don't know If It even exists, but does this PSU has a PCI-e 4.0 ? 'Cause, my GPU GTX650 supports PCI-e 3.0 !
I think you are a bit confused about PCI-e standards and PCIe power connectors.
PCI-e 3.0 and 4.0 (which isn't out yet) are the connection standards between the motherboard and the card.
The connections from the power supply to your video card carry 12 volts. There are 6-pin and 8 pin connections on video cards.
Coolermaster Extreme Power Plus 700W = 2 x 6+2 (8pin) connectors
Coolermaster V700 (most likely what you have bought) = 4 x 6+2 (8pin) connectors
Coolermaster i700 = 4 x 6+2 (8 pin) connectors
I think you are a bit confused about PCI-e standards and PCIe power connectors.
PCI-e 3.0 and 4.0 (which isn't out yet) are the connection standards between the motherboard and the card.
The connections from the power supply to your video card carry 12 volts. There are 6-pin and 8 pin connections on video cards.
Coolermaster Extreme Power Plus 700W = 2 x 6+2 (8pin) connectors
Coolermaster V700 (most likely what you have bought) = 4 x 6+2 (8pin) connectors
Coolermaster i700 = 4 x 6+2 (8 pin) connectors
The Cooler Master B700 has four (6+2)-pin PCI Express supplementary power connectors. The PSU doesn't care which PCI Express Revision is being used by the graphics card or the motherboard or the CPU.
The GeForce GTX 650 has PCI Express 3.0 bus support but that doesn't have anything to do with the power supply's PCI-E power connectors. Full PCI Express 3.0 bus support requires that the graphics card, CPU and motherboard's chipset support PCI Express Revision 3.0.