No issues with SLI that I've seen. Been on the 419 drivers for a while (Win10 Insider, yay). Try reseating the cards and the SLI bridge. If you didn't select the "perform a clean install" ooption, try that with the newer version. 

Works fine for me, this is driver version 430.64
 

Still having issues? Only reason I ask is because your op, and your last post contradict each other.

 
Confirm that the PCIe Slots that your are using with that CPU are Available for SLI, depending on Other things you have installed on MB
 
The MB Mfg has the PCIe "Population Rules" based on CPU - (number of PCIe lanes CPU can support) --> Check in Your MB Manual
 
If its not seen in the BIOS & you have checked that card is correctly seated & PCIe power cables are full seated --> test 1 card at a time to confirm GPU functions as it should
 
 
This from your OP --> "I finally got it up & running! I had the BIOS set to force X16 DUH LOL "
 
So its working as it should ?
 
If it is fixed --> Open your first post & please edit your Title --> Add something in the front like [Resolved] - so the Forums knows all is well & your running