If you want help:
>Assemble parts list
https://pcpartpicker.com/
>State the budget for your build (and country if not USA)
>List games/software you use often, as well as your monitor resolution + refresh rate
>Clarify your goal for build improvements: lower price or improved specs?
How to assemble a PC, select components & more (outdated)
https://wiki.installgentoo.com/index.php?title=Build_a_PC
CPUs:
No i5 unless discounted
>G4560 - poverty-tier builds
>R3 1200 - Budget builds (<$500)
>R3 1300x - Good stop-gap between the 1500x and the 1200, only get a 1400 if you absolutely need multithreading
>R5 1500x - Good but up to 1600 if you can
>R5 1600 - Best value for higher fps gaming / mixed usage; 1600x if you want higher stock clocks
>R7/Used Xeon/Threadripper - Compute/Multitask/VM/mixed use; Not for just gaming
GPUs:
Coin miners have driven price up and stock down, waiting to buy a GPU might be wiser
>Integrated CPU Graphics - Desktop stuff and very light games
>GTX 1050(Ti) - Lower end budget cards, drop settings on newer games, RX560 beaten by both
>RX570 - [email protected]~hz maxed, running most maxed older games at 100~Hz
>RX580 and GTX1060 6GB - [email protected] maxed, [email protected] at lower settings; RX580 better in newer games
>GTX 1070 - [email protected] [email protected] at high
>GTX 1080 - [email protected] / [email protected] maxed, [email protected] in a few games; Probably the highest end card you need for 1080p/1440p
>GTX 1080Ti - [email protected] and [email protected] maxed/high in many games
>Vega GONE.
RAM:
>Check your Mobo QVL before buying any RAM
>Ryzen CPUs benefits a lot from high speed RAM
General:
ALWAYS LOOK AT PRODUCT REVIEWS!
Always consider an SSD. Try buying a large SSD for what you'd pay for your SSD+HDD combined, and add a HDD later
NVMe SSDs aren't for a faster OS boot, they're for productivity/scratch disk/VMs. NVMe and M.2 are not the same thing, M.2 is a form factor