Manage to get all 4 card running on this motherboard with 1x to 16x power riser on all card, The cards are running fine but I cannot understand why one of the card temperature is not reading correctly (temp -103.5C). I've tried a lot of different suggestion on this post but still no luck.
I have tested all the card and they all work as should.

Anyone else having this issue? Its been really hurting my head all week.

Specs:
- Ubuntu 12.04
- AMD Sempron 145 Sargas
- G.SKILL Ripjaw 4GB
- EVGA SuperNova 1300W G2 80 GOLD
- Sapphire Radeon 7950 OC (Dual-X)

http://i.imgur.com/vWGcQVM.png