Question Video card for 4k?

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Well now after testing it the Drobo 5n is completely incapable of being a Flex server. Just a spinning circle on my TV and other devices. No processing power! Not sure why they even have this as an option on a Drobo as it's completely useless! This was trying to stream 1080p content.
Turn off transcoding in settings.
Force videos to play at native resolution (without transcoding).