MSI 970a-g46 works good with 1x to 16x extenders
4 5850 sapphire about 480 watts with undervolted sempron

Anyone know how to get 1x working MSI 990XA-GD55 I've tried the pin shorting trick and added a molex adapter.

Asrock 970 Extreme3 I can only get one of the 1x slots working with extender so just 3 slots with this one