Quote from Runningbear:
Does anyone run into to memory problems running ninja in 32 bit mode?
If you still did not check, NT forum is a good source about 32 vs 64 bit environment discussions. Personally I detected slightly less crashes with 64 bit during fast mkt but I'd not consider it reliable in every circumstances. Also I'm not so sure that multitastking features are really used with multicore CPUs aside when backtesting.