What brings Fortnite to Laggen?

Hello and although I installed in my pc an i7-2600, ne r9 280, 16gb ddr3 1600mhz. Fortnite is still with me anyway and I have low fps. My CPU utilization is in fortnite at 50 percent and my graphics card at 100 percent. Are the laggs on the graphics card?

All in one is not really good to which I would like to tell you that your memory is too slow lg.

Well, if the graphics card is at 100%, then yes probably the. Put the graphics down, 1080p Low creates a R9 280 without any problems.