First of all thank you for all the replies!

Ok so the staples PSU was just a test! as stated earlier I had a 1000w bronze rated Kingwin PSU!

I did not know that the riser has to be powered through the MB's PSU this means I need a better PSU, mobo is currently pulling ~600-615watts and 75w x 4 would be 150 its only rated at 750 watts and NOT energy star rated.

I could still get another staples PSU and test a single or two GPUs, I ordered a 1k watt gold rated PSU and I'll grab a 850 watt bronze PSU.

Just for the record I'm returning the staples PSUs I'm just testing cause I dont want to burn through another PSU from amazon.

Could someone answer if I do not power the riser from the mobo psu would that cause a short like I'm seeing?