I've gotten a shiny new computer with just a 60gb SSD, and I don't store much media so it hasn't been a problem... until I bought a game pack that needs 50gb+ to install. With hard drive prices and my wallet as it is, I cannibalized my old laptop for its slow, 5400rpm drive. 

I'm wondering if the performance will be better or worse if I compress it. Specifically, I'm hoping I can use [this](https://superuser.com/questions/115115/files-being-uncompressed-faster-than-physicaly-allowed-by-hard-drive) effect, considering that I rarely max out more than 2 of my 4 cores.