it is SLI certified and has 86% efficiency under load.
here is my full system specs with all other connected devices:
Intel Core 2 Quad Q9550 - 2.83GHz
Asus P5N-D motherboard
Crucial Ballistix RAM DDR2-800 4GB
eVGA GTX260 Superclocked Core 216
320GB 7200RPM WD HDD SATA
1 DVD-RW ROM Drive on IDE
1 BD-ROM Drive on SATA
PCI TV Tuner Card
1 Case Fan, 1 CPU Fan
Nothing is, or ever will be overclocked
8 Active USB Ports:
Xbox 360 Controller
External HDD (not always on)
USB Bluetooth Adapter.
So the ultiamte question is, is my PSU going to be able to handle all this, with the addition of another GTX260? it will be the same make/model as the one i have now. if not, what would be your recommendation for powering all this with ease?
It should be enough.
I have never used OCZ products, I hope OCZ doesn't lie about their PSU specs/ power rating.
If you were using Corsair, Tagan, Silverstone, Antec, or any well known PSU brands, I can be 100% sure, that it is enough.
I've read some postings (sorry, no links; feel free to call bs, but I don't think I'm the only one) that say that OCZ has been cutting corners on quality in their consumer PSUs in some cases, particularly on the capacitors. I think you have enough headroom though, that provided you have good airflow through the PSU (e.g. it isn't fighting for its air against too many exhaust/not enough intake fans), you should be fine.