I'm using a dual core amd 2.10 GHz (4000+) cpu with 4gb of ram. My bottleneck is the cpu. I can't 18 table on merge because the hud lags too much, but in fairness it lags with HM2 as well. HM1 lags less though and I couldn't even 8 table on everleaf with HM2.
I'm only using name/hands/vpip/pfr/3bet/af. I am using a transparent background though which probably makes a big difference? The only thing is it's really hard to see everything without it on. I'm so close to being able to ditch HM1 for good if I could get PT4 to work just as well 18 tabling.