Sequential read/writes don't really translate to real world performance tho.
SN550 seems like a decent enough drive. But if the SX8200 is only $5 more then its a no brainer. It destroys the SN550 in small file low queue depth random reads, which is what generally shows how much of an imrpovement it will be in real world desktop performance.
AFAIK DRAM on an SSD isn't actually used to cache any writes. It is used as a log/map of data on the drive. But some newer DRAM-less drives use the hosts memory instead. And the ones that don't perform very poorly.Don't these kinds of drives "stall" if you feed them too much data at once? Wouldn't a typical game install make it look like the drive has stopped functioning? (Especially on a laptop that doesn't have an HDD activity LED? ).
edit: If it seems I'm being harsh on this style of drives.... I had a bad experience with a dramless SATA drive which turned me completely off on any iterations of that idea going foreward...