PSU 850W to more than 1 GPU

Hi,

I'm not sure I am posting in the correct place (apologies if I am not). I have a Corsair 850 which is connected to:

AsRock H81 BTC (motherboard)

Rx 570 Gpu (required a 8 & 6 pin connector)

The power supply I have is more than powerful for these, I wanted to add another Rx570 to the motherboard, but wasn't sure how to power it. The current PSU can handle another GPU however there are only 2x 6+2 pin connectors, and each of my GPUs need an 8+6 pin.

is there a way of running the other GPU on the same power supply, or do I need a different powersupply for each GPU?

Many thanks,

Tim