Do I have a 64 bit processor?

redss

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Jun 7, 2003
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On my 32 bit win XP, system properties says I have an Intel core2 duo T9400, and I found the following page on the T9400: http://ark.intel.com/products/35562

That says the T9400 has a 64 bit instruction set... I thought I had a 32 bit processor, but does that mean I can install 64-bit window 7?
 
Solution
The P4 is where the switch was made. I think all the early S478 chips where 32bit only, while some of the S775 chips where split. In this day and age you'd probably have to search hard to find a 32bit only chip.