Aerocool Strike-X 800 enough for 770GTX SLI?

[Senegio]

Hi,

My PC specs:

CPU: i5-2500k (OC 4'2GHz)
Motherboard: Gigabyte Z68X-UD4-B3
RAM: 2x4 GB DDR3 2133MHz
Water Cooling Kit: Corsair Cooling Hydro Series H90
GPU: 1x MSI NVIDIA GeForce GTX 770 2GB (http://www.amazon.com/MSI-N770-TF-2GD5-OC/dp/B00CZ58WUI/ref=sr_1_1?ie=UTF8&qid=1388424769&sr=8-1&keywords=nvidia+gtx+770)
PSU: Aerocool Strike-X 800


I'm thinking of upgrading to 2 GTX 770 (buying another MSI: http://www.amazon.com/MSI-GeForce-PCI-Express-N770-2GD5-OC/dp/B00ENU2K7O/ref=sr_1_2?ie=UTF8&qid=1388424761&sr=8-2&keywords=nvidia+gtx+770).
I won't overclock GPUs

But I think my PSU (4 months old, I changed it when I bought my first 770) is not enough for that SLI. PSU Calculator (http://www.extreme.outervision.com/PSUEngine) estimated 783W adding Capacitor Anging 20%, and my PSU is 80PLUS SILVER

What do you think? Have to buy a 1000W PSU 4 months later?

 

[animal]

according to the link below, they recommend 850W PSU for a system using two CTX 770s in SLI. I recommend adding 50-100W to the recommendation whenever overclocking is involved. I also recommend staying with a quality PSU from a top-tier manufacturer such as Seasonic, XFX, Corsair (except their CX series) or Antec.

http://www.realhardtechx.com/index_archivos/Page362.htm