AVS Forum Addicted Member
Join Date: Jan 2001
Location: upstate NY
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Exactly what motherboard do you have?
In particular, what is the manufacturer of the audio/video/HDMI chipset?
Have you installed up to date video drivers downloaded from the video hardware's manufacturer?
(The drivers provided by Microsoft often are way out of date.)
HDMI audio drivers usually are provided with the HDMI video drivers.
Marantz SR7009 avr + MM9000 amp --> Atmos 7.1.4
Fronts=NHT 2.9+AC2, FH+TM=DefTech PM1000, LCR+TM amped