@Shoaid!
Apparently you are impressed with "Core2Duo" processors, which is why you've upgraded to a Core2Duo ... if you understand what i am trying to say here.
What people dont realize mostly that Core2Duo is just a BRAND NAME. Actual power depends on the Processor's Specifications. A Pentium Dual Core e6500 is faster than a Core2Duo 4xxx series. Under the hood, its just a Dual Core.
You bought this for 6k where you could've bought some e8400 in 7.5-8k from PG Market Place. Remains the question of Security, then the Trader Scores here are given for a reason. You should've told this to your parents.
Anyways, The processor you just bought, this is not going to make a HUGE difference in performance, but it WILL give you enough performance boost to justify the upgrade, considering you are coming from a mere 1.8Ghz e2160 having 800Mhz FSB and only 1MB L2 Cache.
Now i am amazed you did not mention anything about your intentions for the processor, where you just bought it because you were trying to run PCSX2 emulator on it.
Well brother, you just wasted your 6k there. Because PCSX2 needs a much powerful processor to work 'good enough'. Atleast a e8400 overclocked upto 3.8Ghz (1600Mhz FSB) OR a Quad Core preferably (even a Q6600).
It also needs more and fast ram, atleast 4GB and atleast 800Mhz.
PCSX2 is not at all GPU dependent. It takes its whole power from CPU and Ram.
So there you go, if you wana use PSCS2 only, get yourself a Quad Core and More Ram i.e. 4GB. You may use the current GPU with it because its not going to make much difference anyway.