Video cards dual please help

howiewowie

Distinguished
Aug 5, 2011
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I just upgraded windows 10 now it only reads one video card I have two Radeon R9 270 cards crossfire that worked fine with Win 8.1 I've uninstalled drivers and reinstalled to no avail and even tried New beta drivers didn't work, tried plugging all 4 VGA plugs and both HDMI plugs only works on 1 VGA bottom card and 1 HDMI bottom card, cooling fans are running on both cards I'm confused I thought top card is the one to plug in and it was on Win 8.
please help

CPU: Intel 4790k
Ram: 16Gb 1866 DDR3
MB: Gigabyte GA-Z97X-Gaming 7
Radeon R9 270 dual
OS: Windows 10.. 64 bit