Windows 7 x64 or x86

i wanna to upgrade my OS from XP to windows 7 but i found that there are 2 options:
windows 7 ultimate x64 and windows 7 ultimate x86
my hardware is:

processor: AMD phenom II x2 550 3.1GHz
MB: GA-MA785GM-US2H
RAM: 2 GB
Hard: 500 GB

so what will be the perfect choice??

thanks

You can use either version with your hardware specs. I would do the x64 version, its the latest and x86 is becoming antiquated.

To AVOID any problems, it is HIGHLY recommended that you do a clean install though.

One question you may want to consider is; Do you really need the Ultimate version?

Most users won't use the extra features that Ultimate has. Windows 7 Professional will fit the bill for most users.

Hi mon4012 and welcome to Windows 7 Forums

With your spec i would go 64-bit and maybe treat your self to some more RAM at the same time and do go for a clean install with full format

i did not expect these quick answers so, thank you Nibiru2012 and Veedaz but i have 2 questions what do you mean by CLEAN INSTALL?, and what is better the ultimate or the professional windows 7? is it take more space or faster and for a normal user what is better?

thanks again

Hi mon4012 - Welcome to w7forums

A clean install is when you install Windows for a fresh copy. Then all your programs can to be installed.

Unless you need the extra features, the normal home user will never need anything more than Home Premium.

You can see the comparisons here - Windows 7 Home Premium vs Professional vs Ultimate

For all of that extra money that you would be paying for Ultimate, you can have Home Premium and the extra 2GB RAM that you could use. I've looked around, and there's more Ultimate OS's for sale that all other Win 7 versions put together. The online market is flooded with them. I'm running Home Premium, and it's working fine, and it's all that I need.

thanks again but what is the required space for windows 7 ultimata, professional, and home premium

I would say about 10GB to 15GB not including all your software installs.

Including the Paging File and space for the Hibernation (sleep mode), it will take about 12 GB roughly. If you move the Paging File to another hard drive it will save about 3-4GB of space. If you disable Hibernation, you'll save another 2-4 GB depending on the amount of RAM you have.

I always move my Paging File to a separate hard drive, as Windows works better, less fragmentation too.

I use a dedicated 64GB partition to install Windows 7 and all programs to, some here will say that's too big. Maybe, but I've never had any issues doing it that way and several of my friends who are MSDN members and TechNet members say that is just about ideal.

Since the size of hard drives are 360GB and bigger, it doesn't really matter that the partition is 64GB in size. Right now my C drive is that size and all the software installed plus Windows 7 is taking up about 24GB of space, so I could get by with a 32 or 40GB partition size and be just fine.

ok the summary will be:
Using windows 7 x64 which is better than x86 according to my hardware
Using professional or home premium to save some money

what is better to disable Hibernation or not??
thanks