Bump, anyone?

Gents, I'm having a problem adding a second PSU to run card #5(and eventually 5-8). I have 4 Vega 64s powered by a corsair hx1200i, getting 8k (monero) hashes total @ 780 watts.  I set up the rig using this guide http://vega.miningguides.com/ and it's been working smoothly. I'm using an add2PSU to connect two corsair hx1200i's. Whenever I add my 5th card using my secondary PSU, it goes unrecognized in windows. The 'Radeon' lights up, but there is no red light near the power cables.

To troubleshoot, I changed all connections to my second PSU so it acts as primary and it powers 4 cards fine. I've also added 5 cards to each PSU and they all are recognized in windows, and work fine w/ 10K total.  One time I switched two cards to the secondary psu - one card had all red lights on, the other just a green light but neither were recognized.

Dried DDU in safe mode then reinstalling blockchain drivers. Crossfire is disabled, tried a different riser, and all risers are powered by primary psu. Also tried to power the 5th card's riser off secondary psu. I originally setup the 4 cards with that guide and it's been smooth.  Again, I can get 5 working just fine if all are plugged into primary psu. It's only when it's plugged into secondary that it won't show up in windows.

The problem lies with trying to get any cards powered to the secondary psu to be recognized in windows. I'm using a Biostar Tb-250 pro. Anyone have any suggestions?

Gents, I'm having a problem adding a second PSU to run card #5(and eventually 5-8). I have 4 Vega 64s powered by a corsair hx1200i, getting 8k (monero) hashes total. I set up the rig using this guide http://vega.miningguides.com/ and it's been working smoothly. I'm using an add2PSU to connect two corsair hx1200i's. Whenever I add my 5th card using my secondary PSU, it goes unrecognized in windows. The 'Radeon' lights up, but there is no red light near the power cables.

To troubleshoot, I changed all connections to my second PSU so it acts as primary and it powers 4 cards fine. I've also added 5 cards to each PSU and they all are recognized in windows, and work fine w/ 10K total.  One time I switched two cards to the secondary psu - one card had all red lights on, the other just a green light but neither were recognized.

Dried DDU in safe mode then reinstalling blockchain drivers. Crossfire is disabled, tried a different riser, and all risers are powered by primary psu. Also tried to power the 5th card's riser off secondary psu. I originally setup the 4 cards with that guide and it's been smooth.  Again, I can get 5 working just fine if all are plugged into primary psu. It's only when it's plugged into secondary that it won't show up in windows.

The problem lies with trying to get any cards powered to the secondary psu to be recognized in windows. I'm using a Biostar Tb-250 pro. Anyone have any suggestions?

Thank you for the suggestions. Crossfire disabled, tried a different riser, all risers are powered by primary psu. Also tried to power the 5th card off secondary psu. I originally setup the 4 cards with that guide and it's been smooth.  Again, I can get 5 working just fine if all are plugged into primary psu. It's only when it's plugged into secondary that it won't show up in windows.

Does that only apply to when you add a new card off another PSU? Because I was able to get all 5 going on a single PSU plug and play, and adding the 5th on cast amd config.

Edit: just ran ddu in safe mode, reinstalled block chain drivers and the result is the same. Any cards attached to second PSU don't show up in windows. Tried a different SATA cable. I know they're getting power because the fans were spinning when reinstalling drivers.

Gents, I'm having a problem adding a second PSU to run card #5(and eventually 5-8). I have 4 64s powered by a corsair 1200i, getting 8k hashes total. I'm using an add2PSU to connect two corsair 1200s. Whenever I add my 5th card using my secondary PSU, it goes unrecognized in windows. The 'Radeon' lights up, but there is no red light near the power cables.

To troubleshoot, I changed all connections to my second PSU so it acts as primary and it powers 4 cards fine. I've also added 5 cards to each PSU and they all hash fine - however it's far too close to the max watts. One time I switched two cards to the secondary psu - one card had all red lights on, the other just a green light but neither were recognized. The fans don't spin.

The problem lies with trying to get any cards in attached to the secondary psu to be recognized in windows. I'm using s Biostar Tb-250 pro. Anyone have any suggestions?