Computer specification help?

[greelsvish]

Just a question or two about this laptop i'm thinking about getting. I'm buying an HP 2000z customized laptop. What i'm getting is this:

Operating system: Genuine Windows 7 Home Premium 64-bit

Processor and Graphics: AMD Dual-Core Processor E-450(1.65GHz, 1MB L2 Cache) + AMD Radeon HD 6320M Discrete-Class Graphics

Memory: 4GB DDR3 System Memory (2 Dimm)

Hard drive: 500GB 5400 rpm Hard Drive

Firstly, does anyone know what the 1MB L2 cache mean in a processor? Also,is this good enough to play some decent games, and still be able to use it for college at the same time. I also plan on live streaming stuff, and I know that streaming has to do more with your internet upload speed, but I wanna know if these customizations are decent enough to get by. I know it's not a high end computer. Any help is appreciated. Thanks in advance.