1st of all, Congratulations on your purchase.
Now tell me one thing, is the OS installed in your HDD from your previous setup or for your new setup.
A previously installed OS will not work here. You have to install OS in this system. take back up of your C drive by connecting it to some other computer and then install a fresh copy of OS in the HDD by connecting it to your new rig.
Now some suggestion from my side. Windows XP 32 bit will be an useless OS for your rig. A 32 bit OS can maximum access ram of 2^32~3.83 GB. So rest of your 2.17 GB ram will be useless. You will not be able to enhance performance by using 64 bit instructions also.
Better get a Windows 7 64 bit version. And your PSU, corsair TX850 is actually a monster. Will expect you to go for multi-GPU setup with 2 HD 5870.

