nosocomial :
my second question is your saying it sufficient enough to run it but is that just barely or just meeting the requirements and is going to demand alot from my psu and will more than likely run hot and at full blast most of the time.
My answer was based on:
GeForce GTX 470 - Reference Version
Maximum Graphics Card Power (W) 215 Watts (17.9 Amps) from the +12V rails
Two reference clocked cards in SLI mode would draw a maximum of 430 Watts (35.8 Amps) from the +12V rails
Factor in another 12 Amps from the +12 Volt rails for a reference clocked i7-2600K system under full load giving about 48 Amps total.
The OCZ Fatal1ty Series 750W (OCZ750FTY) has a Maximum Combined Power on the +12 Volt rails of 650 Watts (54 Amps).
It is capable of powering your system, with a little in reserve, if you don't go overboard with the overclocking.
Hardware Secrets' OCZ Fatal1ty 750 W Power Supply Review showed that they could draw up to a maximum of 66 Amps from the combined +12 Volt rails before the power supply's protection circuitry would shut it down.
If you're intent on overclocking the graphics cards and CPU then you would be advised to get an 850 Watt or more power supply unit.
Some additional info that may help:
i7-2600K power consumption from the +12 Volt rails:
@ 4.4 GHz 111 Watts (9.25 Amps)
@ 3.4 GHZ 86 Watts (7.2 Amps)