My TI2 desktop is fine with 3.3.0.0 in x64 mode (Intel C2D e2220 2.2ghz, 2gb ddr2 667, win 7 x64); Virus Control in VST3 is noticeably faster and more responsive than the VST 2.4 version; however, the same VST 2.4 is more precisely synced to my Virus: sometimes it will just happen that with the VST3 version I tweak some parameters and they're not sent to the unit, VC sees the edits but the Virus does not and I have to do those edits again with the device's knobs. As far as I love the physical tweaking the parameters which suffer the most from this trouble are the ones with more options (like soft knobs assign) where using the mouse is just more precise.