Hello. I ordered a new 780 and decided to just use my now spare 680 as a PhysX card.
My question is if my PSU will be able to handle this. I have a overclocked CPU and the 780 will come overclocked as well. Here are all my specs:
NZXT Hale90 850 watt PSU
Maximus V Formula motherboard
i7 3770k @ 4.5GHz 1.29 v
Corsair H80i cooler
Corsair Vengeance 16 gigs, 4 DIMMS, @ 1600MHz
GTX 780 FTW
GTX 680 (physx card)
3 SSD's SATA III
Blu Ray Drive
4 250mm LED case fans
Will this be cutting it close and will I need to lower my overclocks? I'm assuming using the 680 as a PhysX card won't draw as much power and I've apparently seen people running two 780's with a 850 watt but I want to make sure I am okay here and have wattage to spare (don't want to be close to the limit).
You are not at all cutting it close. The recommended power supply for a pair of GTX 680s is 750 watts and a pair of 780s is 800 watts on a high powered system like yours.
Here is Guru3D's power supply recommendation:
•GeForce GTX 780 - On your average system the card requires you to have a 550 Watt power supply unit.
•GeForce GTX 780 2x SLI - On your average system the cards require you to have a 800 Watt power supply unit as minimum.
•GeForce GTX 780 3x SLI - On your average system the cards require you to have a 1000~1200 Watt power supply unit as minimum.