OC'ing Patriot Viper 2666mhz ram

Hi, I've been watching some level1tech vids on youtube about normal operating voltages for DD4 being 1.2, but it can sit comfortably at 1.35. I found this ram that could be a potential deal if it overclocks well. I'm wondering if anyone has any experience OC'ing this ram. Seems like a good deal since the cas timings are 15-15-15-31 as opposed to what I'm seeing be the normal 16 timings.

Patriot Viper 2666mhz DDR review (pcenthusiast.com)