I find it works brilliantly I haven’t had 1 game crash since I started using it and have noticed any were from 40 to 300% fps increases I ,m loving it but yes it uses more memory what would be the point of using 64 bits anything if you didn’t allow it to use more then 3.5. That’s the whole point of moving away from 32 bit operating systems anyways is the limits of ram useage More multitasking faster programs and games . You may be having other issues see what’s running in the background because I’ve only got 6 GB of system memory installed and using the 64 bit beta client has solved so many issues for me asfaik its the best thing anet has done to the game besides developing it