The graphics controller available on your processor Celeron G1820 can handle the following screen resolutions and refresh rates:
DisplayPort* 1.2 / eDP*
H-Processors: 3840 x 2160 @ 60 Hz (Ultra-HD)
U-Processors: 3200 x 2000 @ 60 Hz, 3840 x 2160 @ 30 Hz
Y-Processors: 2560 x 1600 @ 60 Hz
HDMI*: 4096 x 2304, 3840 x 2160 @ 24 Hz / 24bpp
DVI: 1920 x 1200 @ 60 Hz
Additional information about this graphics controller here: https://software.intel.com/en-us/articles/quick-reference-guide-to-intel-processor-graphics Quick Reference Guide for Intel® Core™ Processor Graphics | Intel® Developer Zone
Allan.
