No idea but memory is memory for the most part. With that said, I believe 1.65v memory is not "technically" within spec. I would guess it would be fine though.
With that said, I am a firm believer in not purchasing/using DDR3 memory over 1.5v. There is just no reason to have memory that uses 1.65v imo. 1.5v memory costs the same so why bother. I guess you got a good deal and thats fine. I am sure there are no issues with it but I personally wouldnt want to run 1.65v memory.
I run the g.skill low volt 1.25v memory myself to help save on heat/power consumption. I dont even run 1.5v memory. 😛