2 HDD system, should I put OS on small slow HDD?


Mar 7, 2012
I have 2 hdd, an 80gb western digital w800jd sata 3gbps and a much faster seagate baracuda 2tb 6gbps I know it's good to separate your os from files if you have 2 hdd and obviously I want to use the 2tb for my files. But my question is:

should I install my os on the slower 80gb hdd? or just use it for the temp files, browser cache and file paging?
or is it not worth it at all because the 80gb drive is so much slower?