PCIe1x Firewire help!

[Notuern]

I just bought a ST Lab PCIe FireWire 2+1P for my new comp, and it seems to require a 4pin power connector.
My question is: Does it really need the power connector or can it draw enough power through the PCIe-port to power up basic devices?

I dont have any 4-pin connectors on my PSU and i dont have any computer store nearby which sells SATA to 4-pin adapters.

 

[Plendakor]

Mine is powered by the PCI alone and doesn't have a problem supplying the power for my FA-66 (so that I don't have to use the AC adapter).