Is my power-supply strong enough?

Hi everyone, I want to know if my current PSU is enough for my gear, I'm having some crashes on some games and after some hardware tests, it seems everything is fine, so I'm on the PSU now.

I recently added a 60Gb SSD drive for my swap file and temp folder and it crashes since, that's why I'm asking myself if I just asked too much from my PSU.

Corsair HX750W (http://www.corsair.com/professional...wer-supply.html )

Motherboard : ASUS P8Z68 Deluxe
CPU : Intel i5 2500k running at 4,5Ghz with Cooler Master 212+
Memory : 16Gb Corsair Vengeance
GPU : 2 x nVidia GeForce GTX 550 Ti (ZOTAC) SLI
OS DRIVE : Corsair Force 3 120Gb
SWAP DRIVE : Corsair F60 60rGb <-- pagefile and windows temp folders were moved here instead of OS DRIVE (C to save space
DATA HD : WD Black 500Gb <-- users profiles were moved here instead of OS DRIVE (C to save space
MEDIA HD : WD Green 2Tb
STORAGE HD : WD Green 2Tb

you can add DVD writer, media card reader + 3-4 things connected via USB ports.

So, is my PSU is good/big enough

Thanks all!