[SOLVED] Video card for 4k?

[qwiksilvertrav]

So finally making the jump to a 4k home theatre set up. Currently have a home theatre PC perfectly capable for 1080p movies but is not set up for 4k.

It's a small form factor case. These are parts of the setup I have so far.
-Has a 4th gen I5 processor. Should be good for 4k? I'll have to power on the PC again to see what model but I think it's a 45XX or 46XX I5.
-32GB Ram
-Network Drobo drive. Has 32TB storage as it sits right now with 1GB SSD fast cache

I'll be playing movies off of the Drobo. Drobo and HTPC are ethernet wired, no wireless.

HTPC will feed video to a Yamaha RX-V6A and then feeds to a Sony 4k A90J TV.

My biggest question is what low profile/small form factor card can supply great 4k and pass through Dolby Atmos/DTX etc? I will not be gaming on this as a I have a gaming rig already built for that.
Read some sources saying the ZOTAC Geforce GT 730 Zone Edition 4GB is a great, cheap small form factor card that can rock 4k. But then read other sources saying it gets pushed to it's limits and isn't enough.

Basically looking for super smooth 4k at 120hz and able to pass through all the latest sound and video codecs that will work on a 4th gen intel board.

Open to any advice or suggestions! Thanks!

 

[SkyNetRising]

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).