Old Silverstone 750W good enough for my i7 build?

[MrMitch]

Just want thoughts on my old silverstone PSU

I plan on

Core i7 920 hopefully 3.8 or so
P6T Deluxe
12 GB DDR3

Have

2 x GTX 260's
xfi PCI
2 x 74gb raptors
1 x 1TB
2 opticals
7 case fans


I ask because my 750 seems to be the older style with multiple rails. I know i have to plug the 4 pci express plugs in a certain order or the PSU just shuts off as is, but it works good so far with my sig rig, but I am worried a core i7 might require more power.

thanks in advanced.