Definately, Intel fabs their own NAND devices in the USA! The 320/520 also has Intel's own controller in it. I have a 320 & a 330 striped in my laptop (SATA II). The have been working flawlessly for over a year, nearly two for the 320.
After my issues with Western Digital, Asus, OCZ (power supplies) and EVGA (mobo/gfx) I will never trust "gaming" hardware again. Overpriced junk. [OTOH all my Intel, MSI, and AMD hardware is still working after 6+ years in service.]
The 520 is SandForce[1], not Intel's own controller. It looks like Intel has given up on using their own controllers for their consumer SSDs, given that the 330 is also SandForce. Their own next generation controller is in their DC series SSDs marketed towards enterprise & datacenter usage.
