I found a nice chess computer buyer’s guide posted on Chessbase.com website. If you are looking to buy a new computer and want to use your new computer for playing chess or analysis of chess games, then this guide will be very helpful. Also, with the new AI versions of computer programs (e.g. Leela aka lc0, Fat Fritz) which are based on the ideas of Alpha Zero, then a beefy GPU (graphics processing unit used on video cards) is very important. For running the traditional chess engines (Stockfish, Komodo, Fritz, etc.) then CPU (central processing unit) is most important.