I can't even search from 40000000 to 41000000 without running out of RAM on JGecko U, don't know why as with Gecko.NET I could search Wii's mem2 90000000 to 93400000 with no memory issues
Thats odd. i can do a full range from like 30000000-40000000 for example as long as its a 32 bit search and i only have 8GB of RAM. Maybe make sure you have "Aligned" checked. that can save like 4x the amount of RAM usage if you leave it unchecked for no good reason.