If my OS is on partition C and I raid 0 partition D?

To make the storage drive fast as well.

And what modes am I missing out of for using Raid 0. I only know about IDE and AHCI and how SSDs without AHCI don't have TRIM on etc. What mode does RAID use and what features can I not use, such as TRIM in the above example.

Another question I have is...

Can I Raid0 C partition with OS and just have a SSD Cache drive with the Raid0? Not with shitty intel smart response because you can't have TRIM with that on. I am talking about a REAL SSD Cache like Crucial Adrenaline SSD 50GB Cache. It runs on software.

The only problem with SSD caching a HDD that I know of is that you can't defrag your HDD because it fucks up the caching. So I am wondering also if Raid0 gets fragmented really fast.