17" monitor on a 8 year old piece of shit gateway computer.. I can't run HUD if I have more than 12 tables open because I lag to hell. Really looking forward to a new computer... that'll be my first gift to myself once I am beating 100nl.

Ring games
9 tables at once for 6 max.. don't really play FR

SNGs
When playing sngs I typically play sets of 20 or 30 stacked... 9 tiled if I am working on my game. The most SNGs I have played at once is 60. I don't recommend more than 40 in regular sngs and 30 for turbos, though.

MTTs
I never play more than 4 at once.. 2 is the sweet spot. You have to make so many damn moves in MTTs its hard to do this properly with more than 4 tables.