When I purchased my new Sapphire 11265-05-20G Radeon Pulse RX 580 8GB GDDR5 Dual HDMI/ DVI-D/ Dual DP OC W/BP (UEFI) LITE (from Newegg) I only made a cursory investigation into the necessary Dual Mini 6 Pin to 8 Pin PCI-E Power Adapter required to power the GPU.
Now that the card is kaput after...
Powering PC version of GPU Ati Radeon 5870 HD Eyefinity 6 edition 2GB on MAC pro 1.1?
As per https://www.anandtech.com/show/3621/amds-radeon-hd-5870-eyefinity-6-edition-reviewed/9
Power consumption 5870 should use
180 W idle and
296 W load
My mac Pro 1.1 mid 2006 (El Capitan) has only 2 x...