NEW PC running all Games at lower FPS than expected

Feb 5, 2019
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Hello new to this but will try my best.
Have built a new PC, details below. When running games ALL set to Low, I am only getting the following FPS.
Fortnite 30 FPS, expect approx 80 FPS
Rainbow Seige 15 FPS, expect approx 60 FPS
CS Go 30 FPS, expect approx 70 FPS

Latest Graphics drivers installed. Has only been up and running for 5 days after having a fresh instal of Win 10 64 bit.

CRONUS E-CR650W semi modular
Gigabyte B360 HD3 Intel Socket 1151 Coffee Lake ATX DDR4 D-Sub/DVI-D/HDMI M.2 USB 3.1 Motherboard
Intel i7 8700 Coffee Lake 3.2GHz Six Core 1151 Socket Processor
Xilence XC054 Universal Socket 120mm PWM 1600RPM RGB LED Fan CPU Cooler
Corsair 16GB VENGEANCE LED Black Heatsink with White LED (2 x 8GB) DDR4 2666MHz System Memory

Seagate BarraCuda ST1000DM010 1TB 3.5" 7200RPM 64mb Cache SATA III
AFOX GeForce GTX1060 6GB 192bit GDDR5 ATX Dual Fan Graphics Card
1 x D-Sub 1 x DVI-D port - 1 x HDMI port - 3 x USB 3.1 Gen - 2 x USB 2.0/1.1 ports 1 x PS2
Realtek GbE LAN chip (10/100/1000 Mbit)
Realtek ALC892 codec High Definition Audio 2/4/5.1/7.1-channel
Microsoft Windows 10 Home 64bit English OEI DVD Operating Software

Any help on solving this frustrating problem would be greatly appreciated


UPDATE (06.02.19) Uninstalled all Nvidia software and drivers, rebooted and installed latest drivers, still same. Have run a clean boot and removed Anti virus program. When opening Fortnite, FPS shows green at 59%, as soon as game opens up and I go into lobby, FPS goes RED and drops to 27%. HELP
 
Feb 5, 2019
2
0
10


Updated drivers to latest as said above, but will try the uninstal re-instal, thx. Expectations came from the 14 year old I built this for and I agree it is under performing when gaming IMO especially if only getting 30 FPS, but researching further. Since posting I did my own research and concentrated mainly on FORTNITE specs and most peeps say 60 - 144 FPS with 60 being the average. Now I need to figure out all the different settings he could tweek to improve the FPS rate and any PC / Software tweeks I can do to improve it.