|"It came in a bundle together for $200 and I could not pass it up"|
You could have passed it up. Have a look at where your CPU rates on this chart (I'll give you a hint...scroll way down):
You would have been better off with one of the new Pentium dual core CPUs (based on the Core 2) & a board based on the Intel P45 chipset...you could have easily overclocked that combo to 1600MHz FSB. It probably would have been cheaper too.
"I just want to know if I can overclock the CPU to 1333MHz FSB"
I don't know if you can or not? I asked if you are an experienced overclocker & based upon your non-answer, I would have to guess - NO.
The XE is unlocked so you're free to set the multiplier at whatever you want. The default setting is 14 x 266MHz. If you were to simply increase the CPU frequency to 333MHz (1333MHz FSB), the clock speed would be 4.67GHz which is WAY too high. However, if you were to lower the multi to 12x & raise the frequency to 333MHz, the CPU would *probably* run at 4.0GHz. I say "probably" because you would have to know what other settings need to be changed to be able to pull it off.