New rig performance Help

[c.clarke520]

I am confused with my current pc performance. I recently received this computer and cannot seem to run games at the level i would expect. even on low settings the fps is low. I think there may be a deeper issue but i am unaware.   MOTHERBOARD: ASUS ROG Maximus X Hero (Wi-Fi AC) ATX w/ RGB, USB 3.1, 2 PCIe x16, 4 PCIe x1, 6 SATA3, 2 M.2 SATA/PCIe [Intel Optane Ready] [+216] CPU: Intel® Core™ Processor i7-8700K 3.70GHZ 12MB Intel Smart Cache LGA1151 (Coffee Lake) HD_M2SSD: 250GB SAMSUNG 960 EVO PCIe NVMe M.2 SSD - Seq R/W: Up to 3200/1500 MB/s, Rnd R/W up to 330/300k [+67] (Single Drive) HDD: 2TB (2TBx1) SATA-III 6.0Gb/s 64MB Cache 7200RPM HDD (Single Drive) HDD2: 250GB Samsung 850 EVO Series SATA-III 6 Gb/s SSD - Seq R/W: Up to 540/520 MB/s, Rnd R/W up to 88/40k [+95] (Single Drive) VIDEO: EVGA GeForce® GTX 1080 Ti SC GAMING iCX Black Edition 11GB GDDR5X (Pascal)[VR Ready] [+52] (Single Card) MEMORY: 16GB (8GBx2) RGB Lightning DDR4/3000MHz Memory Module (GSKILL Trident Z RGB) MONITOR: 28" ASUS PB287Q 3840 x 2160, 1ms GTG, 60Hz, HDMI/MHL, DisplayPort. True 4K Ultra High Definition Gaming Monitor [+489] (Single Monitor) Thank you to any assistance i may get.

[c.clarke520]

I downloaded HWMonitor. It cant be the cooling. It says the CPU temp right now is value (29c)  min(27c) max(42c) The cooling is: CS_FAN: 3X 140mm Thermaltake Riing 14 Series High Static Pressure 140mm Case/Radiator Fan [+49] (Blue Color LED) FA_HDD: Vigor iSURF II Hard Disk Drive Cooling System [+21] (1 x System) FAN: Corsair Hydro H100i V2 240mm Liquid CPU Cooling System w/ Copper Cold Plate - Extreme Cooling Performance [+83] (2 x BLUE Tt Riing 12 Series Case/Radiator Fan [+24])