This is the link to the specifications:
https://support.apple.com/kb/SP715?loca ... cale=en_USGraphics and Video Support
Intel Iris Graphics 6100
Dual display and video mirroring: Simultaneously supports full native resolution on the built-in display and up to 3840 by 2160 pixels on up to two external displays, both at millions of colors.
Thunderbolt digital video output
Native Mini DisplayPort output
DVI, VGA, dual-link DVI, and HDMI output supported using Mini DisplayPort adapters (sold separately)
HDMI video output
Support for 1080p resolution at up to 60Hz
Support for 3840-by-2160 resolution at 30Hz
Support for 4096-by-2160 resolution at 24Hz
I cannot see the GPU memory size.
I tried to upload .mp4 files into the media pool and it didn't work.
Thanks,