You cant connect 6 GPU's on 1 PSU. There is no PSU on the market with 12 PCIe connectors.
EVGA has 9 connectors. You can run 4 GPU's and if you use a cable-mod (CPU to PCIe) you can run 5 GPU's.
(SuperFlower is the same as EVGA. If you dont need the 2000W, better go with EVGA!)
Of course you can run 6 (or more) GPUs on 1 PSU - just not w/ out of the OEM box cables. You can buy a second cable package from EVGA directly (not cheap, and wasteful,) tailored after-market cable packages from places like
cablemod.com which are made for specific PSUs (slightly cheaper,) or no-name adapters off of amazon, etc (cheapest by far, but requires careful attention.)
But with every energy-spike, every GPU-reset, everything which dont stay optimized will shut down that PSU.
Power use spikes above PSU cap can be easily prevented w/ GPU power limit if necessary - or just proper voltage tuning. PPTs will ensure GPUs reset to desired settings. Someone would have to make some colossal mistakes to have a PSU OV/OT shutdown - esp on a recurring basis.
No need for Platinum and co, if they are only for mining.
This is backwards. The longer full-load runtimes you have on the PSU, the *more* need you have for increased efficiency. Does a gamer need platinum - not really. Does a miner who runs 24-7, at or near capacity - absolutely if they want to save on power costs. Is Gold good enough? - maybe... Really it comes down to a calculation on the premium you pay for the upgrade, vs the saved power costs over the life of the PSU.
Life saver tip: NEVER EVER use cheap 6-pin to 8-pin PCIe adapters to connect just 1 double cable from your PSU to your GPU!!! They will get very hot and if you are unlucky, you can burn down your home!
6-to-8 is not necessary for EVGA 1600s (though under the right circumstances, can also be fine.) As I wrote earlier, I have been using numerous 8-8x2 splitters off of amazon w/o problems for over a year. It just requires diligence in making sure you got the right part, that the parts are in good condition, proper attention to your GPU power use, and some early monitoring to ensure heat is under control.