Re: just bought a closed looped water cooled 1080ti, Will I need a new power supply?

I went to microcenter and went to ask if they could order me a water cooled card and when I went to New egg, there it was! for $950 the

Graphics Card GeForce® GTX 10 Series AORUS GeForce® GTX 1080 Ti Waterforce Xtreme Edition 11G

AORUS GeForce® GTX 1080 Ti Waterforce Xtreme Edition 11G

http://www.gigabyte.us/Graphics-Card/GV-N108TAORUSX-W-11GD-rev-10-11#kf

its pretty nice, no more fan issues, or heat issues, I could leave my PC on in the blazing heat and not worry. And the price looks pretty good I think regular 1080tis went for $800-850

So I have this power supply

EVGA 500W 80Plus Power Supply Unit and it has 2x 8pin (6+2)

I have a 1070 in there, would I need a new power supply, if so which one? Is there a golden standard miners go by?

The answer is yes! You do need a new power supply!
The webpage below reports 471W JUST for the 2 graphic cards, not counting with cpu, MB, ram, etc...
http://www.coolermaster.com/power-supply-calculator/
In addition, bare in mind power supply can lose 5% of capacity per year so you don't know if your power supply still holds the full wattage or if it will next year.
It is true though that the above calculation was done for max peaks of power used and you "might" be able to boot and work at idle, but still you will be totally in the danger zone.
You don't want to risk 2 expensive graphic cards with a small power supply. Get a nice GOLD rated 750W at least, or even higher in case you want to add a 3rd graphic card in the future.

my water cooled gpu just came, so your saying I could burn the chips or mother board using my 500 watt power supply, 1 1080ti and 1 1070? Im going to need a power supply with alot of 8 pin connectors right? or can I use the adapter?

Power supplies of decent quality have protections to prevent damage to hardware in case of failure but I would not risk it. Even with good power supplies you can get a faulty one and fry something in your computer. So you spend nearly 1k or more in graphic cards but not sure if spend 100 in a power supply... It's up to you now, you asked and you have been told! Good luck!

I ended up getting this one

https://www.evga.com/products/product.aspx?pn=220-G3-0750-X1

its 750watts evga g3, its one of the best, or so the guy said. is it a good one?

If I recall correctly, the 750W G3 is done by Super Flower, which is one of the top-tier PSU OEMs. For a 1070 and 1080ti (and nothing wacky with your CPU/mobo/RAM/fans/drives), 750W should do the trick, assuming it has all of the connectors you need.