Did you buy directly from GekkoScience, or from a reseller? If so, which one?

The R909 may have the same case size but the overall design is changed considerably from the R606 to get rid of a lot of the reliability issues that one had. R606 production was straight-up stopped while there was still demand because they just had too many problems, too high failure rate despite multiple revisions.

R909 has better power handling, better cooling, heck it's even got better solder. The biggest problem so far is heatsink screws coming loose during transit but assembly procedures had already been changed by the third reported case.