Im using inspiron 660s.
Intel i3
4gb ram(thinking for upgrade to 8gb)
Psu- 220w(upgradable after changing my cabinet)
Just i need to know gtx 1050 work on my motherboard and any other changes to do on my pc.
That should be perfectly fine for a GTX 1050, but anything much higher and your system will be a serious bottleneck. i would however recomend upgrading to at least 8GB of ram, which should be inexpensive as i believe that motherboard takes DDR2 RAM.