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geforce 9800gt not outputting 1920x1080 res to hdtv
nvidia geforce 9800gt
1yr old 1080p 16:9 hdtv
dvi (outfrom pc), converted to hdmi, into hdmi switching amplifier, hdmi to tv.
signal works fine under lower resolutions, but now that i've started to d/l my blu-ray i'd obviously like it to be in 1080. running windows 7, and in my resolution settings it does show 1920x1080, but when i select it, my tv reads "invalid format". i seem to be able to run up to 1360x768 as max res on this tv. tried running hdmi directly from the pc to my tv and bypassing the amplifier, same result. any idea?