new built pc lagging

[Noobsrus370]

hi I built my pc about a month ago, I have tried everything from updating all my drivers doing stress tests, running cleaners and virus scans. but it still keeps lagging everytime I try opening programs and gaming please help.

my pc build
CPU-AMD ryzen 5 1400
GPU-GeForce gtx 1060 g1 gaming 6gb
MEM- 1 stick of 8gb ddr3
MOBO-gigabyte AB350 gaming 3
PSU-thermaltake litepower 450w
SSD-OCZ trion100 240gb
HHD-barracuda 1tb

please help

 

[adiec]

4 x DDR4 DIMM sockets supporting up to 64 GB of system memory
* Due to a Windows 32-bit operating system limitation, when more than 4 GB of physical memory is installed, the actual memory size displayed will be less than the size of the physical memory installed.
Dual channel memory architecture
Support for DDR4 3200(O.C.)/2933(O.C.)/2667*/2400/2133 MHz memory modules
* Support for higher than DDR4 2667 MHz may vary by CPU.
Support for ECC Un-buffered DIMM 1Rx8/2Rx8 memory modules (operate in non-ECC mode)
Support for non-ECC Un-buffered DIMM 1Rx8/2Rx8/1Rx16 memory modules
Support for Extreme Memory Profile (XMP) memory modules

what ram do you own ? type /speed ? ( for example ddr4 3000mhz )