Hello, I have 3 r9 280x (Gigabyte).
- One is in case, in PCIe x16 Slot working fine
For the other two I have 2 expanders, and two slots (PCIe x16 and PCIe x1).
Because the GPUs wont fit inside and it would be overheating both must be on expanders outside case.
I tried all combinations of plugging those cards in those slots but none work as intended.
- Either only card nr.1 worked (0 - Internal, 1 - 1st external (PCIe Expander 0006), 2 - 2nd external (PCIe Expander 0007s))
- Or all showed up but system completly froze. (Only force restart helped)
Each time I swapped, it did one of those.
What can be causing the problem?
Too weak PSU (EVGA 850B, those cards have 300W TDP Each), or
Cable, expanders, or something else?
(BTW Cards are working fine if connected only 2 at the same time)
CPU: Intel Celeron G3900 (2 Core)
MoBo: AsRock B150M Pro4S
RAM: 1x CRUCIAL 4gb (there is only one supported type:
http://www.asrock.com/mb/Intel/B150M%20Pro4S/?cat=Memory&Model=B150M%20Pro4S&Vendor=Crucial)
Thanks.