I have 2 Rx480 and 1 Rx470
Working perfect with one card directly plugged into pcie x16 and 2 usb powered risers
Now I bought another Rx480 with usb riser
So my problem is with 4 cards plugged into Mother board PC (Win 10) does not boot...
Fans are spinning on all 4 cards
Anybody know why??
Maybe its because of PSU?
Its 750 Watt
I have to undervotlage my 4xRX480 4GB to run from a 1000W PSU. Really can't see how 750W would have a chance.
don't confuse people.
I've got here 6 rx400 on 1KW doing just fine (the most intensive dual eth&sc takes up to 920W from the wall, ZEC is about 750W)
EDIT: undervolted to the very bottom ('bout 850mv), lowered core, 2K mem, bios mod
The problem can easily be related to the pcie lanes/resources availability, play with bios: disable devices, set lower generation for the slots, disable power savings, etc... Drivers setup in win can be an issue as well.