wandering heart
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VSWR said:32-bit HFSS can only address and use 2 GB of RAM memory, even if you have e.g. 4 GB in your PC with 32-bit Windows. But you can use the switch /3GB in boot.ini to get HFSS to use up to 3 GB of memory. 32-bit HFSS is one of the very few 32-bit programs that can use this feature. But the /3GB switch does not work on all 32-bit PC's.
64-bit HFSS on a 64-bit Windows can use all memory you have in your PC.
If you have a large HFSS design that requires more than 2 GB of RAM, 32-bit HFSS starts swapping to the harddisk which is very slow compared to RAM memory access. Moving this design to a 64-bit HFSS (and a 64-bit PC with >2 GB of RAM) gives a dramatic increase in performance and simulation speed, as the simulation can run entirely in RAM.
Look to windows task manager.jensag said:How do you verify that you are running the 64bit version of HFSS?
Note that 64 bit version of HFSS 11 does not work on Vista, only on XP 64.
It is unknown when this is going to be fixed.
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