Hi There guys, I'm quite new on this site so I'm not exactly sure what goes for what However it might say, I've recently just bought a new PC with these specs: CM HAF 922 ATX CHASSIS XFX PRO850W CORE EDITION 80+ B ASUS P9X79 DELUXE MOTHERBOARD INTEL CORE I7 3930K 3.20GHZ 12 KINGSTON 16GB 1600 MHZ DDR3 CORSAIR HYDRO H100 CPU COOLER PATRIOT PYRO 60GB SATA 3, 2.5" SEAGATE 1TB 7200RPM 64 MB LITEON 24 X DVD WRITER SATA EVGA NVIDIA GEFORCE GTX 680 SC Signature Few days ago I decided to go to 3D and bought a Samsung 27 inc 3D Monitor. The bummer is that I just found out that 3D gaming takes alot more GPU power that 2D gaming so I ordere another EVGA NVIDIA GEFORCE GTX 680 SC Signature for SLI. My question is, will my power supply be big enough for all the hardware or do I have to upgrade that as well? Also, I have a 7.1 headset, gaming mouse and keyboard which I presume also draws its power form the PSU? Sorry for all the questions, I'm not an expert on PC's so I ask you guys , I just want this to be right.