Quote from: Skinny48 on Today at 05:32:19 AM

1. Is a Corsair 650 PSU enough to power six gtx 1660 not super not ti.

The power consumption of a 1660 is something like 75w to 90w, and you have the power of Motherboard, CPU etc
6 of them is not advised to run with only 650w, and even if you can run, you'll not have enough PCI-e to run
And another thing, with ATX PSUs it's better to run with some extra capacity, a 850w gold PSU could be good for you

Quote from: Skinny48 on Today at 05:32:19 AM

2. Who is running a add2psu here are they reliable for running two PSU at the same time?

add2psu is simple enough to not worry about, it's just a starter for secondary PSU, it doesn't make any difference, even you can start manually a secondary PSU

Quote from: Skinny48 on Today at 05:32:19 AM

3. Can I run an extra GPU in a m.2 slot on my motherboard ?

There's adapters to m2-PCI-e, I don't know which motherboard you have, some can run without any problem, some have limits