Changing L2 Cache Size…

Hello again… I’m using a Compaq Mini Netbook CQ10-120LA…Win7 Ultimate x86, Atom N270 @ 1.60GHz, 160GB SATA-II HDD and now 2GB DDR2-800 PC2-6400 RAM. My Q is: What are the effects of changing my L2 Cache from 256k to 512k?? The thing is that CPU-Z (CPUID) and Everest Ultimate tell me that my L2 Cache is 512k…BUT Windows 7 Manager tells me that its actually at 256k… Truthfully I’m confused… What’s better as far as performance is concerned?? 256k or 512k?? I honestly don’t know much about what the L2 Cache does and its purpose… Please help me out guys I would really appreciate any and all info concerning this… THX…