(Solved) New custom PC running slow

[MattBre]

My friend recently had a pc built for me. However, the pc is performing badly. I personally have no clue why it is. Here are mye specs:

Corsair VS550 550W KPC Bulk Edition
At least 85% efficient (80 PLUS White 230v EU Certified) Kun for PC-prod

Intel Core i5-6600K Skylake
Prosessor, Socket-LGA1151, Quad Core, 3.5GHz, 6MB, 91W, 14nm, Boxed, No fan incl,

Akasa CPU Cooler AK-959CU
Socket 1150/1155/1156

Cooler Master Hyper TX3 Evo CPU Kjøler
1150/1151/1155/1156/1366, AM2(+)/AM3(+)/FM1/2, 800~2800RPM, 15~43 CFM, 17~30 dBA,

ASUS Z170-P, Socket-1151
ATX, Z170, DDR4, PCIe-x16, CFX, HDMI, DVI, M.2,

Crucial DDR4 2133MHz 16GB (2x8GB)
16GB Kit (8GBx2) DDR4 2133 MT/s (PC4-17000) CL15 SR x8 Unbuffered DIMM 288pin

MSI GeForce GTX 970 4GB
PCI-Express 3.0, DL-DVI-I, HDMI 2.0, 3x DisplayPort, UEFI

Samsung PM951 SSD 256GB PCIe
M.2 PCIe, up to 1000/280MB/s read/write, for production only,
Seagate Barracuda® 1TB
SATA 6Gb/s (SATA 3.0), 64MB Cache, 7200RPM, 3.5", PC-prod only, Varenr: 822241

 

[turkey3_scratch]

Performing badly how?