I have a pentium Dual Core E2160 rated at 1.8GHz with 800MHz and 1M L2.. My motherboard is a MS-7525 I am looking to upgrade to a Core 2 Duo E4400 with 2Ghz and 2m L2 but it still has only 800MHz bus speed. I am wondering will i see much performance difference? i know i should get a e7 series but i cant afford it so i just wanna know what kind of performance increase i will see. I am running Windows 7 32bit with 4g ram.