Will the Palit GT440 1GB DDR3 be bottlenecked by Pentium D925

Somewhat but then again you could get away with a faster card on that cpu but not by much. At 9800gt level performing card like a 6670 will do just fine. If that GT440 is GDDR5 it will be faster than most by about 10% give or take a little.

i would say taht if its ddr3 then its performs optimal that what he can do or if it ddr5then pentium d will bottleneck it

Don't listen to monue_08, he or she couldn't even make a proper sentence. One of my old friends had the same cpu with a 9600gt and it ran fine. The GT430 performs about the same as a 9600gt and same for the GT440. For most the difference is only clocks while there are a rare few that are GDDR5. Those are faster but not by a lot. If you could widen your options you can get a much better card for the same price.

this is what u need http://www.newegg.com/Product/Product.aspx?Item=N82E168...
and its far better then gt430
http://www.hwcompare.com/11762/geforce-gt-430-vs-radeon...
for performance and price + consumption this is a brilliant gpu