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#240
Welcome to Seven Forums rageej.
With your specs I would suggest to install the 64bit.
Depending on which type and version you have, retail will come with two DVDs, one is 32bit and the other is 64bit. They will say on the DVD.
If you D/L'ed it you will have the choice of which one you want to D/L.
There is no 32bit or 64bit choice to select during the installation.
Hope this helps