Hey need advice asap

The pentium D would give you a nice performance boost over the regular pentium.

The Pentium E5300 is based on the same architecture as the Core 2 chips, it will be superior to the Pentium D which is based on the older Netburst architecture of Pentium 4's, its also going to be more power efficient. They will be close but the E5300 will be a bit faster overall.

So just stick with me e5300 Dual core then? Thankyou verymuch for a very quick response much appreciated guys

How can the Pent. D be slower. It has an additional core, twice the cache memory of the Pent., and runs 200 MHz faster?

Pentium E5300 is a dual core.

tbh i not 100% but i thought pentium d was older than dual core ok the speeds might say it bit slower but newer technology counter acts that same with the new hdds these days 5900rpm i believe it was with 600mbps transfer 64mb buffer.
But i am not positive as to why i asked on here lol

The E5300 is a dual core, wolfdale based like many Core 2 Duos, the pentium name merely implies that it is lower performance than the Core 2 Duos (E6xxx and up), there is also a celeron name that has been used many times since the original celeron and is now very different performance wise so the naming scheme gets confusing.

You are correct though about newer technology helping, Core 2 based chips are more efficient than Netburst based chips so even though the Pentium D is clocked 200MHz faster (~7.6%), the architectural advantage that the E5300 has more than makes up for the clock difference. For comparison here is an E5300 vs a Pentium Extreme Edition 955, same architecture as the Pentium D 915 but with an even higher clock speed and hyper threading to boot, and it still gets beat down by the slower clock E5300
http://www.anandtech.com/bench/Product/98?vs=93