Quoting myself here as well for visibility because it seems like some people are starting to get hit by the memory limit:
The problem is only for Windows 10 1709. Switch to Windows Server 2016 or any Linux distro and you'll be fine.
ETH is still unaffected by this, though - only ETC, because it is few epochs ahead. But ETH should hit the 3GB Windows limit within a month or so. If you still got a problem - try using the iGPU as primary or get another card with more memory as the main one.