It is actually not so clear if Paging File should be tweaked to
replace physical RAM. Paging File will write and seek, and that
will involve an extra step in accessing the Hard Disk. Also, if I
remember correctly, to properly do this, some tweaking in the Hard
Drive is needed too. A dedicated small drive should be partitioned
and used solely for the purpose of being a Paging File.
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Actually you should check if after some time playing, you
experience more and more lag, and then the application crash. If it
happens then it is memory leak. Usually the developers will release
a patch to solve this problem. You can try and download their
latest patch.
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If you buy HD, might as well buy a proper RAM. RAM is very cheap
anyway.
Meat Pao.