Hi,
Can you please give me some advice, I'm heaving trouble with new Sapphire RX VEGA 64 Cards.
I had two cards running before on my motherboard:
1. slot PCIe 16x - GTX760 (working)
2. slot PCIe 16x - RX470 (working)
Changed to 2x VEGA 64 cards:
1. slot PCIe 16x - VEGA 64 (working)
2. slot PCIe 16x - VEGA 64 (not detected fans not spinning - overheating)
Tested and plugged old cards back as it was and 2. slot does not work anymore:
1. slot PCIe 16x - GTX760 (working)
2. slot PCIe 16x - RX470 (not detected fans not spinning)
Tested only one card on 2.slot:
1. slot PCIe 16x - Removed no card
2. slot PCIe 16x - VEGA 64 (1 long beep and 3 short beeps)
Tested only one card on 3.slot:
1. slot PCIe 16x - Removed no card
2. slot PCIe 16x - Removed no card
3. slot PCIe 16x - VEGA 64 (1 long beep and 3 short beeps)
Conclusion:
1. PCIe 16x slots are not the problem (not broken or dusty)
2. All cards are working but only in 1. PCIe 16x slot
So far:
1. Uninstalled drivers with DDU about 4 times
2. Installed and tested with different AMD drivers 17.xx - 18.2.1
3. Updated Motherboard BIOS
Still does not work! Please help!
Motherboard: ASUS P9X79 https://www.asus.com/Motherboards/P9X79/
PSU: CROSSAIR RM850 - 850W
Sorry a little confused still. So are you saying that all cards work in slot 1 by themselves, but don't work in slot 2 or 3 by themselves?
If that is the case maybe it is a motherboard issue? That or something really messed up with chipset driver. You could try and boot from a ubuntu usb drive or dvd with one card and see if that works. If so you rule out hardware and at least know it is something in Windows or the drivers. Have you also run this issue by Asus support?