Not Booting at first time.

[cx-ray]

This appears to be part of a larger problem. For instance with my Asus Rampage II Extreme I experience waking up from sleep problems when the Xonar Phoebus is installed on any PCIe x1. I managed to solve the problem 100% by configuring the last slot to x8 (actually runs in x1 width).

To elaborate, the PCIe auto config with two GPUs installed by default is x16 x16 x1. I must run it in x16 x8 x8 for the Phoebus to not cause waking up from sleep problems. If I'm assuming correctly it appears the card doesn't like running on a x1 slot that's configured by the south bridge.

[Gastly]

This appears to be part of a larger problem. For instance with my Asus Rampage II Extreme I experience waking up from sleep problems when the Xonar Phoebus is installed on any PCIe x1. I managed to solve the problem 100% by configuring the last slot to x8 (actually runs in x1 width).

To elaborate, the PCIe auto config with two GPUs installed by default is x16 x16 x1. I must run it in x16 x8 x8 for the Phoebus to not cause waking up from sleep problems. If I'm assuming correctly it appears the card doesn't like running on a x1 slot that's configured by the south bridge.

I have the same problem. But unfortunately, my motherboard supports no option to change the mode PCIE slots: (

[dsp]

on my rampage 3 extreme i plugged the phoebus in the last x16 slot but strange thing is gpu-z is still telling me my cards are @x16x2
if i am correct 1 card should now be @x8 right ? (slot 1-gtx580 - slot 2 - empty - slot 3 -gtx580- slot4 phoebus )

[f.a.i@hotmail.com]

I have the same problem. But unfortunately, my motherboard supports no option to change the mode PCIE slots: (

Same Problem here