SOLVED - 4x RX380, Windows only detects 3 cards, Claymore miner only detects 2

[imtav]

I'm running Windows 10, have 4 RX380 hooked up with PCI-E risers.  Windows only detects cards plugged into 1st, 2nd, 4th PCI-E slots, Claymore only detects cards plugged into 1st, 2nd slot.  To make sure the equipment wasn't faulty, I swapped the cards and risers from slots 1 and 2 into slots 3 and 4 and the problem persisted.  So the gear is definitely all good, it's just whatever is in slots 3 and 4 won't detect.

Motherboard is TA-970 with latest BIOS.

Please help!

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[dmatthewstewart]

Have you tried running it with cards only in slot 3 and 4?

[imtav]

I tried reinstalling drivers, problem persisted.
Then I tried using amd cleanup utility and then reinstalling drivers, and that did the trick. Got all 4 running now. TY