SSD Raid for games and OS, or just games?

What percentage is your O/S drive filled? If it is over 80% full then install your O/S on your Samsung RAID, otherwise your current setup is good.

I have 50GB free on the 128GB SSD (about 40% free) and I don't think I'll be using any more space on it anytime soon. I'd like to have all the space on the 2 drives in raid available for games, but if it would be a performance increase to squeeze the OS on there too, I'm not opposed.

You're good to go as is.

Your performance will be better benchmark-wise with your O/S on the RAID but real-world you wouldn't notice too much difference.

I'm not concerned about what my benchmark numbers would be. If there truly wouldn't be a noticeable difference, I'd rather just keep it as is -- so I'll have more space.

What about putting your OS, programs and games on the RAID0 SSDs and use your 128GB as a cache disk for your WD drives?

My, 2x HDDs in RAID 1?????? Thast what yo defentelty should be going for RAID 0.

RAID 1 nowadays IS NOT BACKUP. The proper way to do it is with a external HDD. If anything goes wrong, your files are emedialty acessable by ANY machine (including Macs out of curiosity)

Now, of course putting the OS on a RAID 0 setup would be awesome, but for a better organized computer, is tottally fine to put OS and apps in one volume and exclusevely games on a second.

If you feel sad that your OS and apps are not on your faster volume, buy a OCZ PCI-e SSD revodrive, for the ultimate experience!