32bit vs 64bit Win7

My system is a Gateway GT5639E, w/ Quadcore Q6600, 3 GB of ram, Intel Stoughton G965T mb. Can I install a 64bit version Win7? My Vista OS does identify this a "Win7 ready"? Is this due the 3GB's of ram?
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More about 32bit 64bit win7
  1. Your CPU can read 64-bit instruction, so yes you can use Win7 64-bit.

    Win Vista and Win 7, use about the same range of ram.
  2. http://windows.microsoft.com/en-US/windows7/32-bit-and-64-bit-Windows-frequently-asked-questions

    "Can I install a 64bit version Win7?" Yes, but you may need to hunt for some drivers (I ended up buying a new wireless n adapter, no 64-bit driver)
    "My Vista OS does identify this a "Win7 ready"? " That means you meet minimum HW spec for win7.
    "Is this due the 3GB's of ram?" 3GB is roughly the max you can use with 32-bit windows. (It's less than 4GB because of memory mapped IO, etc.). IF you have more than 3GB of memory 64-bit windows will use it. 32-bit windows will ignore it. (I have a system with vista 32 and 4GB memory. It runs fine and uses about 3.4GB of real memory.
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