Budget PC build for 20 man multibox.

[Speed]

This way I am getting constant 60 fps on which ever toon I am active on. I highly doubt, that 32 GB RAM will be enough for 15 toons, if you want to do something more than idling in town. As soon as I am playing doungeon or pvp, RAM usage goes for 2-3 GB per wow.exe instance. I had to lower the graphic settings even more after the prepatch 8.01. because they changed the game and it suddenly much worse to even start the game. Where as on monday 11 clients started 1s after each other, now it is 5s, and logging (even choosing which toon to play) tooks sometimes half a minute! So now I have clients set to /console renderscale 0.4 on all except leading toons, and starting the game is significantly faster. I dont mind having toons on lower settings, because 90% of time I have active windows on leading toons.

Do you have ssd? Alot add-ons? Also if you didnt update WoW client(recently blizzard released few mini patches), logging will take long time.
Tested Dalaran with my 5 man on full-pop server. Was runing in circles in the city. I have the same DDR3@1600mhz memory, ram usage 1.7-2gb, Fps Locked 60/15, CPU usage on main ~25% steady 30fps while running, ~8-10%
on slave windows.