Razer blade pro fhd, 4k 60fps in windows desktop only?

I can't seem to find any definitive answers to this online. What are the specific capabilities of this laptop when using an external 4k monitor? THE PROBLEM... I have a 4k monitor that supports 60fps. I hooked it up to my razer blade pro FHD hdmi port. I plan to use it for work, and hadn't planned on gaming with it in this setup. It is just for work, at least until I get my hands on the razer core chroma X. I noticed that the screen flickers a lot and goes black for a few seconds every couple of minutes or so. I researched it online and tried a number of things that didn't work. All drivers are up to date. And I mainly have this issue when I use it in on second screen only mode with the laptop closed. I set the power settings to do nothing when lid is closed. Finally, I set the refresh rate all the way down to 30fps. I've been using the laptop for about 30 minutes this way and no flickering so far. But, I am curious to know what the limits are for this setup. Is 30fps the max that this laptop with a 1060gtx is capable of displaying in 4k through HDMI in desktop mode? Or, is there a problem that may return? Please help. Thanks.