But the processor fsb is 800Mhz is not matching to the RAM does it make any problem?
Your processor Pentium D 925 runs @ 3.00GHz x 2 (800MHz FSB). It will be fine. But, again, please read my previous post if you are going to use 1333MHz Memory.
I have edited my post, because, I have to double check my documents (Microsoft Excel table) regarding your motherboard and processor. Sorry about that.
Apart from that, your motherboard should have a modifiable memory multiplier that'll allow you to increase memory speed to 1333MHz without touching the FSB.