i m curious about this too.... SL likes strong single core performance so i guess the most suitable amd cpu would be something like 5800x or 5900x which booth have the highest boost clocks in single thread workloads and very strong ipc... the 5900x has the extra advantage of extra l3 cache per core that helps of more data preloaded for processing staying away from the memory sticks that are slower.... that means more stable fps and less stutter .... ofcourse all cpus are kinda overkill for Secondlife only ...but its a mistake in firstplace to build a machine for specifically for SL ...plus with these cpus you ll be able to stream and do side tasks with almost no impact while logged on. So its only a waste of money if its money you can t really spare...Now for the 5800x3d its a weird mix...on theory its should do miracles since in games like gta 5 and flight simulator , that are vast rendered words with a lot of multiplaying it really shines destroying the above cpus that clock higher and were considerered the best or amongst the best gaming cpus last year ...the huge L3 cache makes experience buttersmooth and gains up to 50% in lows and 15-40 % in avg fps depending the game...but...SL likes both...l3 cache and especially high clocks......and high clocks aren t the best feature of 5800x3d so im not 100% it will improve SL experience... and i d personally go for the 5900x which is cheaper...and has 2/3 of the 5800x3d cache so it s not missing too much in that area... having way higher single core boost clocks that SL loves.....if are on tight budget better go for 5800x.... If you don t have fast internet though SL won t care much about your computer hardware .....it ll still lag and freeze...i have overkill specs pc and although i see huge max fpsi still get lag and freezes at full areas or doing sails/ races in heavy sims because of my adsl internet... waiting for the fiber 200mbps to hopefully enjoy much smoother experience in allinstances